I’ve just tried the new XM-L2 in my Convoy T5. Did not like it because of greenish tint. I got the 4000K version from Kaidomain, which was supposed to be below BBL, but it was noticeably greener than 519A 4000K (non-dedomed). I’ve reverted to LML2AW.DC 4000K, because that one is rosy.
Regarding tint shift: T5 comes with 60° beaded TIR, it mixes color very well, and both LEDs look fine. I’ve tried how it looks without the lens (just bare LED shining outside of flashlight), and there was very noticeable tint shift from new XM-L2 and very little tint shift from LML2AW.DC. The situation might be different with a reflector, though.
(Oops, sorry for necroposting, I thought the comment I’m replying wasn’t that old, anyway, I hope it’s still helpful for someone!)