I run two vixens: a 2-8x32 on a Howa mini and the 3-12x40 on a Tikka.
Compared to VX2s of similar magnification (I don't have a vx3 to directly compare):
They seem to be brighter (especially in twilight) and larger FOV (i wear glasses, so it might be about eye relief?).
The Leupolds can be mounted lower as the variable magnification ring is not so pronounced.
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