Thanks guys for the feedback. I should have been a bit clearer on my question. I was thinking more technical than ergonomic.
I did have an 18-55 with my XP1 when I bought it, but I rarely used it so I sold it. My most used lenses would be in this order. 35 (1.4) 14, 55-200, 56, 23. 23 is my least used, because I also have an 100S that I take everywhere, which has the 23. I love the lens, but just don't use it much.
Out of the the lenses, I have, I was wondering which will perform better with the XP1 sensor. I want to take advantage of the sensor in the XP2, so I am thinking that longer focal lengths will allow this, plus when cropping you won't lose as much. Plus the longer lenses will auto focus better on the XP2. ( not that I worry about that)
With the smaller sensor of the XP1 , less cropping. Plus I usually manual focus the 14mm anyway.
So technically, which one would be better on which body. I have been using the 14 on the XP1. I guess i'm going to have to head out and just do some shots with each lens on the two bodies and compare.