yeah, what they fail to acknowledge is whether it's an 'evolution' spec RS or not. The early RS's have the same 14B turbo as the regular VR-4 while Evolution VR-4 has the big 16G, along with the rest of the 'evolution' spec non-RS VR-4s. So an RS can have a 14B while a non-RS can have a big 16G.
Same with the vented hoods, extra vented bumpers, 510cc injectors, larger intercooler, 4 bolt rear end etc etc it's all dependent on being Evolution or not rather than being RS or not.