Are the SSM's in the stock location or are you using them as lift bars?
If they are in the stock location, then unless you have an alignment issue or bind in the SSM's I wouldn't think you wouldn't see a difference between them and the TRZ's.
If they are being used as lift bars, it will depend on HP and IC points. Lower power cars like the lift bars, higher HP cars tend to hit the tire too hard and unload with lift bars.
If you have an A-body 12 bolt where the ears are closer to the housing, getting rid of the lift bars may actually hurt you because of the poor upper arm angle.
Not really answering your question, but there are a lot of variables.
If I ever figure out how to make an A body 12 bolt really work in a G body with my limited budget, I will share the info!!!!!