Buying the extra "T" is never a bad thing. Just as with powders, you're getting the "extreme" line of bullets which produce more consistent results and less sensitivity to temperature and speed.
Not surprisingly, the TTSX emulates the Partition in many cases by shedding a portion from its front. Bullets which open very consistently, yet penetrate deeply - even after the loss of the initial 'bloom' and at the expense of some mass, have a very long track record for reliability. Those who hunt in warmer climes may not notice these advantages as much.
