I think the answer to the recoil question is that the R9 is what you will be carrying when you need it. The 6 rounds will be used in rapid succession, most likely, and at very short range. Even with its snappy nature, the recoil will not prevent the pup from doing its job. Comparisons are irrelevant, when the pup is functional and accurate enough for its stated purpose.
As is said in another thread, the R brothers say that it was designed to shoot a full mag, cool, clean, and continue carrying. Carry lots, shoot little.
I carry it even around the house... Frankly, i consider the Glock 22C as my backup.