I actually read your thread about your delta and they had one at the store, but could not do it for several reasons. Not being disrespectful at all but here is why.
7 rounds v.s 15 rounds
Versatility, I just have to buy a glock upper in .45 and it fits.
Weight, again with more rounds.
Basically no safety, muscle memory is huge in this, but one less worry.
Light rail. Not one on delta.
Great gun, but I believe it would be a safe queen, like my TRP.