Not familiar with the two specific barrels you mention but I do own a few BA barrels including an 18" SPR. What ranges you figuring on shooting? To be honest, in a 16" gun, you probably wont notice the few ounces from a medium weight barrel like the BA 16" Gov Profile midlength gas barrels. I own 3 and they shoot quite well with 60 gr VMAX
https://www.ballisticadvantage.com/16-5-...ern-series.html
It gives you the option to run a can, vs a pencil barrel and will be a little stiffer. I dont use any lightweight specialty parts and this rifle as it sits is 8.1 lbs
-16" Gov profile mid length BA barrel
-Midwest Ind Handguard, VG6 Gamma break
-M16 cut FailZero BCG
-Radian LT charging handle
-standard Aero upper/lower
-BCM buffer tube kit
-Mapul MOE grip and SL stock
-Magpul MS4 Sling
-Aimpoint P.R.O. in a Larue LT150 mt
-Magpul MBUS pro sights
-Cant really see it but a Surefire G2X Pro LE in an Arson Machine mount
Sorry the lighting sucks but itll give you an idea. I would imagine with a lightweight barrel, it might shave it to 7.8 lb?
If I absolutely had to go LW, I would have no trouble choosing either of those. Roscoe barrels is worth a look as well. Hope this helped a little