Either would work fine out of a xbow. I have tried and liked Grim Reapers and Rage. Currently I still have the Rage in the quiver since I got a few packs on sale. Shot a buck a few years ago with them and it entered just in front of the shoulder and exited thru the front part of the back ham and still flew another 50 yards. Buck just stood there, didn't know what hit him till he toppled over 10 seconds later.
I used the killzones in my compound. They were very accurate but the one deer I shot with them I never recovered and very little blood even though it passed thru. They have good reviews though. You should always go with what you are confident in.