While the j-fame is smaller, the extra round of the DS is better, besides the newer DS has a very short grip frame. If you wanted to, with custom grips the DS can be made smaller.
I like the shrouded hammer models of the j-frame, over the sharp hammer of the Colt. factory hammer shrouds for Colts are sort of bulky but effective.
I guess the bottom line is I wanted a Colt, so I got a Colt.
The DS has been discontinued for now, but doubtless will be back with all the interest in the CCW/Police market. It's far easier to find a new j-frame.