There is a difference, depends on your needs
I had Red Armstrong 93 Chip, GN ran rich, sputtered above 100 mph...
Last night, installed Accufab adj fuel regulator from Full Throttle Speed, added TURBO TWEAK 93 street chip & 60lb injectors, idle was INCREDIBLY MUCH BETTER... hands down smooth running car, shifting, starting...
Going to track tonight at WIR for real street drags, I live in Kaukauna and have drag strip 2 miles from home... no need for trailer...
since buying GN Hard top, in March 2008, I have added 3,000 miles... one of the best rust free cars I have seen, beat up when purchased, but a little paint and a few bolt on mods and all is well... plan is to drive 87 GN to NC and GA for 2 buick events and then back home to Wisconsin.