I think that overall they should be equally reliable.
Now, I am an oddity in the shooting world apparently. I have had 2 G34s, 1 G26, 1 G20 and 3 G19s. All 3 G19s were not totally reliable. The malfunctions I experienced were few and far between, but contrast that to the G34s, G26 and G20 which have never malfunctioned. My next G will be a G17.