I have both on my carry guns - presently I have Crimson Trace in my snubbies and Lasermax in my Glocks.
I switched from Crimson Trace to Lasermax on my Glocks because I didn't like the feel of the grip with them on, and I find I have better control and can make faster follow-ups with the Lasermax units installed. I've never had a failure of any kind.
Regarding Crimson Trace, I've always found them to be reliable and they've never failed. I think they're great on snubbies; my wife uses them on hers, also. I don't know how they'd feel on an XD. But as far as reliability goes, there is absolutely no issue.
Just my opinion based on my personal experience with both makes. Your opinion may vary.
Stay safe - DW
NRA Endowment Member
Retired Fed