I wonder how much larger the grip will be. Wonder if they'll get into G19 size and be short 3 rounds.
Left to Right, Glock 19 (15 rounds), Sig P365 XL (12 Rounds), Glock 26 (10 Rounds), Sig P365 (10 rounds):
Same as above, but viewed from the top:
L-Glock 19 (15 rounds), R-Sig P365XL (15 round optional magazine): (Sorry, the side picture didn't turn out.)
The Sig is longer with the 15 round magazine. Interestingly, for as small as the P365 XL is compared to the G19, the weight difference with each loaded to standard capacity (15 and 12) is only 5 [edited from 4] ounces, of which 1.2 can be attributed to the extra three rounds of ammo in the Glock.