Either are good bullets. Keep in mind there are several different types of Shockwaves and XTP's as several have noticed. I only have personal experience with the following:

1. .430 240 grain XTP- my hunting buddy has used these for years, and they are
deadly on deer. Some have been pass-thrus, some have stayed in the deer, but in
general I have always been impressed with them. He uses 80 - 90 grains T7.

2. .452 250 grain XTP- another hunting buddy uses these. Similar performance to
#1, the only difference is maybe less pass-thrus with this bullet, though it's hard
to say for sure.

3. 200 grain Shockwave- I've taken 3 deer with these. They penetrate very well and shoot flat. All were pass-thrus. Expansion has been good, though not
spectacular. I used 80 grains T7 on 2 deer, and 100 grains T7 on 1. I like these bullets for long range shooting in more open territory. If I was hunting in a
swamp or very brushy area, I would use a different bullet.

I have no personal experience with the 250 or 300 grain Shockwaves. There is also a 300 grain XTP and a .40 cal 200 grain XTP which I used to use and did a good job.