I tried to go from 8" Venture Highs to Indy 149s. I thought the board felt like a boat, it didn't turn as well, and I lost a half inch of wheelbase despite the deck having a longer WB than my old 8.12" deck.
While it was easier to slash pool coping, I didn't like the way it felt when I did the "standing slash" aka "not properly locked in 5-0".