CSR Racing 2 - Fastest Half Mile Tier 5 Car to buy with Cash?
I think they might be the same performance at the end, because CSR 2 depends on how many Fusion parts implemented and how many Stage 6 upgrades fitted + Tuning so if as you say all of them with same amount of Fusion Part, same upgrades and same level of tuning I think its hard to say there will be a difference in time