As an INFP, I cannot help but find the ISFP type fascinating. It seems to me that we are a lot alike. I like that we're both primarily introverted feelers. Our biggest difference is that we experience the outer world in different ways--the ISFP comes off as more sensual than the INFP, more immediately in tune with the richness of the physical world.
I find it also interesting that the ISFP is called "the artist," because as an INFP, I like to think of myself as an artist as well. Perhaps the art that the INFP is more frequently drawn to is of a slightly different nature. Where the ISFP might enjoy the more physical acts of painting or sculpting, the INFP might have a more innate appreciation for, if we can call them in this way, the "softer" arts (vis-à-vis the "soft sciences"), such as music or poetry.
Now I don't want to generalize here. I don't mean to throw borders between our camps, delegating certain arts to each group. After all the MBTI is not meant to be used to exclude; it is a spectrum, and as a spectrum of human nature, I'd like to think that even our positions on the spectrum is in a state of flux. At our core we are beings of energy, so it makes sense to me that our natures can flow about within the confines of the parameters of our identities.
That is all to say, an INFP is certainly capable of being "sensual"; an ISFP is equally capable of being "intuitive." We may have our predilections, but like many boundaries, they are meant to be liberating.