I prefer the A7 to the T3, in particular the ejection port. I also like the A7 bases compared to the T3 rail with Optilocks, that of course can be fixed with real aftermarket bases. Both have junky stocks. Both are incredibly light, but I'm not sure I'd want, say, a .270wsm in a long action if it can be avoided. The real question is, it it worth the extra few hundred bucks in my opinion? I don't know that that would be enough of an upgrade, but I do know they both shoot like sweethearts.
I'd still prefer an 85 over either, regardless of weight. If a regular sporter is too heavy for me, then I think I need to spend more time on the treadmill instead of in front of the PC!