My vote smc.
I've had both and recently my promatch puffed in 1 run all the sudden. Then the next time I plugged it in... It toasted my Esc and my servo. This just happened to a guy Dan at my track too last week. He didn't loose his servo tho just Esc. This cost me about 400$ including battery too. I will ever buy them again. It's a shame too they were good packs and I like them. We are both bummed.