Oh man I sort of disagree here, I like Gate of Thunder way more than Lords of Thunder, even though I still love both. They're probably in my top 5. I don't think that accessibility is the only thing that LoT has going for it, and sometimes the music can be a bit too over the top for me with mindless guitar shredding (though that's not to say that it isn't sweet.) The soundtrack to GoT seems a bit more fitting for the game itself where it gets bumping or fast with whatever level you're on.
Some of the level design in LoT isn't as elaborate or cool as GoT. LoT, for me, could get pretty cluttered on screen with all of the gems. GoT had the sweet levels where those pillars would come in and out and you had to do some clever maneuvering throughout a lot of the levels.