The SAR K2 is marginally shorter front-to-back and a good bit thicker at the hand grips. Sadly the K2 fits my had much better than my beloved 97 IMHO.
I did add a Dawson Machine PARA Hi-cap +2 mag extension to my cut-and-welded, extended 97 magazine. It now holds 19 rounds. With 19+1 in the 97 the gun weighs over three pounds! However you only need to reload a couple of times on a typical day at the range...Ha!
The same Dawson mag extension on my SAR K2 gives me 16+1 capacity and it is still a great gun for cancelled carry!