Not super knowledgeable about enneagram, but I know I'm a 4w5 and I know I'm sp/sx. Sadly there aren't necessarily descriptions about how the two go together. I have looked. I did not find haha.
I can't provide general descriptions of how these all measure up, so I will just answer your questions in the context of myself
Would a 4w5 Sp/Sx INFP come across as being more cold and detached in comparison to other INFPs?
I see the logic of how an INFP 4w5 sp/sx could seem super cold and detached, but I personally wouldn't describe myself as such
on the whole. I try to be very engaging, but at the same time, I don't hide my introversion or my true nature.
One of the patterns of my life is that I decide to talk to one person and somehow they end up becoming a really good friend, so in that sense, I definitely identify with SX in the friend making process. I thrive one-on-one. The friend keeping process seems heavily affected by my SP instinct, as I want people close, but not in my space, which causes the most tension in the majority of my relationships. All of these people I've singled out tell me they thought I was an extrovert, probably because of my approach, but once we start to make plans, that's when they learn da truth, lol. In group environments, I'm generally a lot more quiet. I don't know why, I just am, and that is sadly commented on a lot. People get confused by the switch. If I love the group though, then my one-on-one self is present.
There are some environments where I probably seem extremely cold and detached, so this seems to be true in situations where I'm not comfortable, or socializing is not my objective. Typically in group "event" environments or amongst a sea of people, I will revert to my lone wolf ways and will subconsciously don my "don't talk to me" look.
I'm pretty polarizing. I'm either really there, or not even trying. No idea how this would compare to other INFPs...I wanna say that 5-fix INFPs might seem more detached.
Here is a pretty great description of sp/sx that mentions a few things I've described:
This type has a quiet, down-to-earth but mysterious quality. They are intense within but may seem withdrawn to others. They naturally seek intimacy but not at the expense of their independence or emotional security. This may create a pull-push effect, in which they draw others in but detach if they feel like they may get hurt. For the few interpersonal bonds they form, their loyalty is unbreakable, but these alliances make them feel more secure. They attach to others at an organic level, as opposed to the sp/so's formality. They are often unaware of the social dynamics and goals of a group, but they can read an individual with accuracy. When they sense their well-being is in jeopardy, they either completely withdraw or confront the danger head-on. Some have an appetite for wild adventures, which they view as learning experiences. They see their home as a refuge, and they take pride in decorating their surroundings.
From what I've read, 4 and 5 are 'withdrawn' types. Would that mean that we are less likely to share our inner emotions and feelings to others?
Yes. From the sounds of it, the only aspect of us that seems highly motivated to engage is the SX, since engaging can be tumultuous as a 4. Connection is tough to find. I certainly relate to being really selective in who I share things with, to what extent, and when. It is very easy for me to feel discouraged if I don't receive the type of support I need, and so I will detach and not share anything private when that happens. Sometimes the other person doesn't even notice when I do this. I'm very aware of how not sharing deeper aspects of myself affects my relationships to certain people. In my eyes, they have to earn it. One of the hardest lessons for me to learn is that I can't have intensity with everyone...it's just not possible, for me or for them.
Here's a 4w5 description that directly answers your question:
Average 4w5 is emotionally heavy. Powerful, passionate feelings and aesthetic appreciations swell within and then get bottled up inside. 4w5s generally avoid expressing their feelings because they feel that no one could possibly understand them. Like 4w3, they feel special and different, but 4w5 is more likely to withdraw into sullen silence than to make a big public scene. 4w5 and 5w4 both have strong feelings which they repress, but because their feelings are stronger than their repression, 4w5s are more aware than 5w4 of their inner emotional state. Consequently, they are more likely to become depressed. There is a kind of delicacy to 4w5 that is not usually present in 4w3.
As for other possible 4w5 sp/sx observations, I would think we'd be really creative with our environment and home space. Adding the INFP element, I'd guess that we are pretty nostalgic in that regard, and cherish objects that were given to us by those we love. My room is littered with things people have made for me, whether or not they fit my aesthetic. I just feel so special that they care! I also keep oddball souvenirs for wonderful memories...it's almost like I'm adding these memories as part of my environment.
I would assume that the 5 wing/sx combo would make one somewhat obsessive with their interests...I know this happens to me. If I am interested in something, I dive in and do not crawl out until I'm satisfied, frequently annoying those around me by wanting to discuss it so much. But being an INFP, once I've exhausted the interest, I move onto something else, adding to the collection of interests.
I wonder if we'd bring elements of sp/sx into our INFP 4w5 creations...I don't know
how but that'd be an interesting thing to explore...