If you go over to Gunblast.com, and do a search on model 63 in their archive of articles IIRC Jeff did a review of it about 2 years ago when S&W started making them again.
I have a Taurus 94 with a 4" barrel, its a similar size to the 63, and an old S&W 43 airweight kitgun, I also have K frames. The smaller guns are easier to carry, fun to shoot, but the DA pull is going to be heavier to reliably light a rimfire due to the ssmaller mass of the hammer, than a K frame.
Now I dont find the trigger pull to be any problem on the 94 but it has 20,000+ rounds fired over the last 12 years, and I also dont find the 43 to be a problem, but some folks complain about the trigger pulls on these guns because it is or seems heavier than a K frame 22lr.
BTW I think the 63 is a nice gun and its on my want list.