Minh, yes, they are the exact same Pistol but supplied with different capacity Magazines. Most manufacturers including Glock make firearm packages that have 10rd magazines so their pistols can also be sold in state that have magazine capacity restrictions. The pistols are exactly the same but just have 10rd mags included. The pistols will also accept any standard capacity magazines just fine.

Minh, Same gun. same weight unloaded. The 15 round capacity Glock will be 5 rounds heavier loaded.