TunerCat and TunerPro have .bin compare functions. I took a quick glance comparing the Impala SS to a stock caddy and a Caddy VP4. Just engine management settings (not transmission). The spark, VE tables were basically the same. O2 rich/lean was set a little leaner for the SS and caddy has speed limiter MPH & RPM lower than the SS. The SS tune I looked at had PE fueling differences over the caddy tunes. Looks like all the drive-ability (and V4P towing) differences were in the transmission, TCC lockup tuning, plus each has hardware, suspension and mechanical differences. I think the VP4 has some different transmission internals, but don't really have time to research that out. Bottom line looks like putting a caddy tune in a SS will richen it about 1-2% and it will drive like a family sedan. Early softer shifts, more TC engagement,w/RPM limiter around 48-4900 and and speed limiter set at 108. Caddy tune may have a less fuel in PE mode, not sure if that's seat of pants noticeable. As far as the engine it will run without any noticeable differences.