Can anyone tell me from first hand experience how much of a difference the SF (short frame) model felt compared to the regular G21? I've have not been able to find a G21 SF locally to know myself.
For me, it’s quite a bit different. The regular 21 always felt like holding a 2x4 to me, and kept me from ever buying one. The 21SF fits my hand great, and I bought one after the first time I tried it.