the lack of power u feel is all because the vert is a lil heavier, but it makes up for it by turning heads.
i know because i have an '06 gtp vert. and it's black as well.
2006 pontiac g6 gtp convertible - black
reflective purple overlays, airbrushed engine/fuse covers
soon to have tint, rims, dash trim airbrushed, and cai.
2008 pontiac g8 gt - liquid red
20' zinik wheels /toyo proxy 4'', airbrushed engine/fuse covers, hood vent mod, lower panel mod
20% window tint all around except windshield ,sidemarker tint mod, V8 6.0 side badges, holden rear deck badge, SS badges ,VE badge, chrome pillar side posts, custom axleback system(soon to come kooks LT headers and corsa cat-back), OBX throttlebody spacer, volant CAI, Superchips tune