So you're saying every 1911 trigger, every 1911 trigger pull, every set of 1911 grips, every 1911 slide, every 1911 grip safety all feel the same? The original poster asked a question and I gave my answer.
The other gun was a RIA 1911 by the way.
Of course they're not, but the things you mention above aren't the things that make a 1911 a 1911. You can tell the difference by feel between a Colt Python, a S&W 357, and Ruger GP100 by feel. They're totally different designs, models, frames, sizes, placement of controls, etc, etc. The things you mention above aren't any of those ... particularly the trigger issues.
I guess you're saying that because the RIA has smooth grips and the Ruger has checkered grips that every gun you hold (with your eyes closed) that had checkered grips was a Ruger, and every gun with smooth grips was an RIA. Same with the trigger ... If I gave you two 1911's ... are you actually trying to tell me that you could pick the Ruger by the feel of the trigger ? That is simply not possible, whether you're talking about 1911's ... GP100's ... or P95's.
You may be able to tell the difference between two 1911's that you've already examined with your eyes OPEN ... then you close your eyes and identify one or the other, but to take two generic production 1911's that don't have obvious (and KNOWN) cosmetic differences, and claim that you can tell which is the Ruger if you've never seen either one before is just plain not possible for 99.999% of 1911 owners.