I take it you guys are talking about TSXs? Are they really different than the X bullets?
While not 100% sold, I think the empirical evidence from others is that yes, they are better. I won't use standard X type bullets any more (after one bad experience) but load up the TSX and MRX. Have not taken any game with them, however.
A comment on the Speers - the 160g 7mm Grand Slams served me very well for 20 years. Never lost an elk, none went more than a few yards and most didn't make it that far, and only recovered one bullet - after it had wrecked both shoulder joints of a 5x5 bull elk. Speer changed the formula for the core, however, and I decided to make a switch to true bonded bullets.
Barne's new Tipped TSX are probably about as good as it gets, and I'll probably use them in the future instead of MRX when using Barnes bullets. While my main hunting loads use North Fork bullets, Trophy Bonded and A-Frames are in the same class of bonded-core bullets and I won't deign to say which is the best.
At a minimum I'd got back to Grand Slams.