I've never owned or used the FLE version of the 50mm, but I do own and use the pre-FLE 50CF. My understanding is that the floating element comes into play mostly for close focussing. That said, though, I've used my older 50CF at distances of about 1 - 2 feet focussing on engravings on headstones and I've never been disappointed with the results. Would I be able to see a difference in my standard print sizes between the two? Dunno. I'd have to shoot both side-by-side and I've never cared enough to pursue this initiative.
I think you'd be well served and very happy with the pre-FLE CF or CFi; especially if funds are limited.
Good luck!