Are the C02's a lot stiffer than the cartels or triads?
Burton rates their responsiveness on a 10-point scale as follows:
CO2 -- 8
Cartel -- 7
Triad -- 6
So yeah, the CO2 probably much stffer than Triad, a bit stiffer than Cartel. The CO2 costs about $370 and Cartel is $230. IMO, you'll probably be wasting $140 if you buy the CO2s.