Thanks, Jon. In this case the Bantams in the OEM rubber and these Bantams in G10 are identical in size and coverage. Plus, the finish on the aluminum frame is not much to write home about so I wouldn't lose any sleep over it.
I'm very pleased with these grips in that they offer great purchase while allowing the cover garment to move without catching and do not feel like sandpaper against my skin if I'm not wearing a compression shirt under my t-shirt. In fact just back from taking the dog a mile or two and I didn't feel it rub on the abdomen at all.
Money well spent.