I had half an hour yesterday to play with the following combinations
15706 Xf v2 with stock classic dw and mikey cyclops
15706 Xf v2 with mikey modern dw and prof cyclops
15707 xf v2 with stock modern dw and mikey cyclops
15703 noob with omega dw and noob cyclops
15710 jf v9 with mikey modern dw and jf cyclops
in a nutshell i believe that :
Xf dw opening is larger than jf or noob
This makes the slightly smaller stock classic font a little too small
I prefer mikey cyclops generally even if prof is way way clearer (but it has a blue tint)
Modern font on XF is exactly the same of mikey modern which is good
The same does not apply to classic font which in the double digits especially tend to be a bit too small
Also in my humble and absolutely unbiased opinion if you have jf cyclops there is no need to change it. It’s great.
Stock xf cyclops on the other hand MUST be changed; then at that point get prof cyclops I’d say and poop on them peasants !
Jf and xf crystals are absolutely perfect, fantastic clarity
Last but not least the stem is clearly weak, or not as good as jf or noob, in XF divers. Of all 3 i have here every time you fiddle with it it’s not working perfectly all the times. Empirically speaking obviously. Especially when you screw back in
Bonus: the 2 15706 despite being purchased as both v2 have slightly different casebacks. The rest is equally good and similar on both (great marbling sparkling in sunlight - the noob i had couple of years ago was quite dull) so not sure if my friend or I got not what we asked for or the factory has some different batches or parts.
PS: I still have them with me couple of days so if you want to see other details dlmk