Well, the V3 has only two better parts:
-Correct caseback
-Valid manufacturing date between the lugs
None of these two can be seen by anyone, and if you take the watch off, they could only notice that the model no. is engraved with a slightly bigger font than the genuine.
I forgot, the V3's chrono sec hand is more accurate colorwise, a very slight difference imo.
What are the other supposed benefits of the V3?
-More crisp bezel engraving: sure, it is more crisp, but the fonts are too thick (I'd say about 1,2x or 1,3x thicker than the gen). In comparison with that, the V2 uses correct thickness fonts, which are a bit less crisp, but this is NOT NOTICEABLE without magnification.
-well, I can't think of anything else!?
But here are the benefits of the V2:
-Stamped B on the bezel
-Better dial (breit. logo bolder, more gen like)
-correct length pushers
-More gen like pearl (I'd say 95% spot on)
-Better AR
that's all what comes to my mind this second...
EDIT:
-V2's bezel engravings go more towards the edge of the bezel, also more accurate to gen.
And just to be clarified, I'm saying these statements after holding a V2 and a friend's V3 next to a genuine at the same time.
PS here is a photo I attached to another thread in the past, don't care about the dial, just look at the bezel, pushers and pearl.
Thanks JKay, but I still have to learn, and will always have to, ya know...
Greetz.