I have a Ruger LCRx 9mm and a Ruger New Model Blackhawk .357/9mm convertible.
Shooting 9mm in the Blackhawk is very nice. POA=POI up to 20 yards, which is as far as my crappy vision will let me shoot with any accuracy. Recoil? What recoil? This gun is almost 3 pounds and is designed to take full-house .357 magnum loads, so my standard 9mm round is quite tame by comparison.
Shooting 9mm in the LCRx took some getting used to. Even with the Hogue Tamer grip it was rather punishing to shoot. Eventually I got used to it, but unfortunately the LCRx is prone to crimp jump problems when using budget ammo like Blazer Brass. It didn't happen every cylinder, but it did happen once almost every range trip (usually around my 12th or 13th moon clip). I've never had a problem with premium ammo like Federal HST, but I haven't shot nearly as much of that through the LCRx - usually just a moon clip or two to remember the sting of the +P recoil.
I must say, loading and unloading with moon clips is awesome and quick. This is probably why I keep the LCRx around despite my complaints. If I were to do it over, I'd probably avoid a 9mm revolver and stick with a .357. Or even a .38 Special. Of course, I'm stubborn and *won't* do it over, so I'll keep shooting my 9mm revolvers and whining when they sting my tender li'l hand. YMMV.