MY OPINION:

The best: VV2
Most impressive: VV4
Most challenging (without spoilers): all of them!!! smile
Most visually attractive: VV2

I noticed that some of the heads and clothes in VV1 & 2 are the same. And some of the heads and clothes in VV3 & 4 are the same.
But nothing in 1 & 2 matches 3 & 4!

Signed by
*123ISOLAGIRL*
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Can't wait for VV6 <3