Mixed bag. While my claws/sr brute would seem to be more efficient thanks to holding aggro which decreases the chance of runners, in the end, the claws/sr scrapper still kills so much faster that when comparing 100% clear all DA repeatables at max diff, the scrapper still gets it done quite a bit faster. Sadly, thanks to the way tanks were buffed here on Homecoming, even the sr/claws tank is faster at clearing missions than the claws/sr brute just due to the increased power of their AoEs.
Edit: the brute still wins against single hard targets like AVs and pylons, of course. Tanks were overbuffed, regardless. They should NEVER beat brutes on damage output, aoe or st.