Bul EDC or Tac 4.25?

I already own and carry a Tac 5 (pictured last), and dont have an issue carrying heavy pistols. But now I've currently got the bug for a 4.25. I'm debating the EDC and Tac 4.25. I love steel, the full length rail, and the 4 20rnd mags the Tac comes with. But for carry is aluminum really that much better/lighter? The difference is only 5 oz. Which would you buy and why?