I’m no expert. Here’s my opinion

I have a 2.25” SP101 and multiple J Frames and K Frames and old and new model Colt Cobras.

My wife hijacked my SP101. That’s the gun she likes and uses it as her bedside gun. She likes it because the cylinder release is more agreeable for her than the smith release. She is unlike me. She found her gun and stuck with it. She doesn’t have any interest I trying out the Colts.

The Smith J Frames are slightly smaller and lighter. Good for carry, not as much for shooting. Triggers are better than the Ruger. More grip options available for the Smith to cater to what feels good for her hand size

K Frames are bigger. 6 rounds.

The new model Cobra I got is slightly bigger than a J Frame, good weight to it for shooting, 6 rounds, and a very nice trigger. Fiber optic front sight. Not as many grip options.

Can you go wrong with either? No. Find what she likes and run with it