I don't find that to be the case at all.... Ride is very reliant on the dampers being used as well. And how do you quantify "perform" almost equal? The Steeda Sports (of which there are two different sets, I only use one specific version) are not super low which maintains good working travel and are not ultra stiff which means you retain better movement over bumps, etc.
I'm a Steeda believer and prefer them. I can sell Roush too as my biggest warehouse distributor carries Roush.... I just don't like them as much personally (and they weigh more too).