I had bad experiences with both the early BT and SST, now it is whichever has a higher BC or is cheaper. I have complete faith in the Nosler but still getting comfortable with the SST. I am also using the ELD-Xs which are a sort of second generation SST crossed with an A-Max and so far so good. For deer I don't think it matters too much.
That mirrors my experience with those two.
I'm back with the NBT with good results. Haven't yet gotten back to the SST, but probably need to.
Both are very accurate, were also back in the day when they blew up.
DF