I'd go with the "race" if it has provisions for progressive or 1:1. Everything Monte said is true about the 1:1, but some engines are hard to drive with 1:1 linkage. The engine's reaction to throttle movement, if tuned well, is instant. The slightest movement of the pedal can give you more than you want, and setting the tps rate of change needs more sensitivity. All can be overcome, but the option is there if you need it.
I fix a lot of driveability issues AFTER tuners get there hands on cars, and progressive linkage always will be easier to drive.
If this is a car that is typically street driven, you would be much happier with this option, whether you use it or not.