Either one is an excellent choice but if you ever want to carry it the G19 is optimal. I would stay away from C versions. They port the gas and the flash straight up in your line of sight.
^this
my mom has a G17C. The marginal benefit in recoil is outweighed by the dragons breath coming out of the slide. It makes the internals filthy as well from venting directly into the slide. Not a fan. If you want a comp'ed gun get either a threaded barrel or external comped from lone wolf.