This is a tough decision to make, since both binoculars you mention (FL and UV) are very good. However, maybe your previous experience with larger FL and UV might not be a perfect reference point, because both 8x32 are pretty stubby and short. Yes, the 42 mm FL and UV are also quite compact for the objective size, but the FL has AK prisms, which kind of makes for a "bottle shaped" tube, and the grip of the 42 mm UV is really different to the 32 mm. I have middle size hands with shortish fingers but wide palms (kind of bear-ish, if you know what I mean), and found the handling of the 8x32 UV to be less adequate than the FL (or other designs for that matter). My fingers would end up a bit crammed on the upper part.
"Try before you buy" is always a great advice, but when dealing with former top dogs (where the quality of the optics is granted) the fit and user experience amounts for a bigger part of the buying decision. I was in the same position as you, and actually bought both the FL and UV and could compare them directly side by side.
Optics-wise, I found the 8x32 FL and UV to be distinctly different. The UV had a lovely crispy view, full of contrast, with more vivid colours (so, the trademark "Leica View"), while the FL was surprisingly bright, but that sort of paid a toll in contrast, or at least the (this is very personal) feeling that the image was a bit washed at times. Overall, I preferred the view through the UV. I had the 8x32 in both UV and UVHD and I don't recall a huge difference.
Focus wheel was OK in both FL and UV, I think I preferred the Zeiss, but neither were a favourite for focusing experience, maybe due to the mechanical nature of both focus wheels, which makes for a "dry" feeling, not as soft as greased wheels.
As a wild card, I don't know if you've tried the Conquest HD 8x32. Yes, it's heavier and bulkier, but the view leaves very little to be desired, the focus wheel is among the softest and fastest I've tried and, depending on your hand size and grip preference, they can offer a great feel on the hands... and can usually be found for way less than the FL or UV. But then, I guess if you're interested in the FL/UV, it probably means that size and weight are a priority.