If you can wait a day or two I'll do a head to head on a few tracks. In the meantime could you please try this with Trigger - Generate a blip of audio and put it right at the start of the drum track. I use Pro Tools signal generator. Make sure you put the blip right on zero. Make it loud enough to trigger Trigger. Then proceed as usual. When you drag out the MIDI, obviously its really quick to align because you just drop it at zero, but that's not what I'm talking about.
I swear it works, I have no idea why. When I do it this way it comes out way more accurately, it's not the same result if it start part way through the song.
There's probably a demo version of Drummagog. I don't love it as much as I used to. If you're going to demo it you should know a few things, its a CPU hog, which is fine but I find it doesn't throw useful errors, instead it just doesn't want to play nice.
Another thing, and this is super important, it's terrible at live tracking. When you play back you'll hear things randomly out of time. If you print the output this goes away.