Like everyone else has said, it ALL depends on the driver, Stick IMO is def more all around fun to drive, but my auto 06 GT with the Bama 93 Race tune C&L Racer CAI and 410's is a blast to drive......chirping 2nd 3rd 4th and has chirped 5th 2 or 3 times, when the gas tank was really low='s less weight, WOT of coarse.
I can tell you this tho, most bracket racers run automatic trans, for one reason....consistency, yes there are VERY good bracket racers that run manual trans and are consistent, but most run automatics.
As far as which is faster, a PROFESSIONAL driver driving, I would say with either a tuned or non-tuned 11 GT, the manual would probably be a bit quicker in the 1320.