I think that 19's gonna be a little easier to concealed carry. I like the G43 because it clips right into my back pocket. It's pretty much the size of my wallet and I can carry it pretty much anywhere without "no guns" signage with no one the wiser. I use a +1 extended mag though to get my pinky on the grip, won't use anything that I can't fully grasp.
My field pistol is an FNP-45 with an RMR atop. It's a very nice large frame, high capacity .45 ACP pistol.
That is the style 1911 my old man used to carry for Concealment now he just caries a Glock