I was just about to post the same question. The VP series is already wider to start with, so how does a vertical center give a wider dispersion? I can see how the soundstage is better as you would be using exactly the same speaker so no difference in sound quality at all, but the wider dispersion thing has me scratching my head, always has.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70