Ive run them both, back to back, love them both.
I also run p-01 and P8L back to back too. they are similar and great shooting, but a little different.
I shoot the 97 better, I think its because of the better trigger, FO front sight and grips. I like think boomerang like guns vs short fat grips - have med. sized hands.
The k2-45 is very nice, and shoots well. It could use a better trigger and the grips aren't the best. BUT it has a rail, is stainless AND holds more so win in SD/HD.
I have carried it shoulder holster with no light, same as 97. I wish they had a soft rubber grip like the P8L has, it is like a custom velvet mitten.
I did have a friend that had sight issues with his pistol. I never got to shoot it but seemed like a weird 1 off problem.
I would not feel bad at all recommending the SAR over the 97. Theres also mag extensions for the Sar mags now as well so thats even more cap.