I have never used the FE2 and therefore cannot comment on it.
I have used the F3 and loved it.
I still use the F2 because I love it even more.
If I had to choose between the F3 and the FE2 for an auto exposure body to work with my manual exposure F2, I would choose the F3 only because I am familiar with it. However, in actuality, I am using the F4 as my auto exposure body because I also get an auto focus feature.