Very different, as far as MFB territory goes. The T2 is tougher, rougher and more harsh, is def more techo and dark club style. There’s growl and punch in what it does.
The Tanzbar I, in my eyes, while it kicks like a mule and swings like nothing else, is more subtle and delicate. It’s just very focused on what it does and it does it extremely well. Works silly well in a mix.
The reason I didn’t keep the Tanzbar 2 for long, was that it was a bit of an undecisive product, as far as MFB goes. It has a bass synth, it has three sample voices, it has a mix of analog and digital voices, and it has enough depth to call it a groove box for complete tracks.
But MFB aren’t known for making instruments that can do complete and comprehensive tracks, but rather support a track with their friggin’ awesome drums or synths. But not carry them entirely on their own.
So the more you look at the Tanzbar2 as a one stop (or almost at least) groove machine, the less you’ll like it, I think, no matter how great it sounds. This is where the Rytm, for example, is superior. It’s clearly made to be equally great as supportive instrument or complete on its own and excels at both, if you just commit to what you think it should be for you.
If you are looking for a killer MFB drum package and you’re prepared to shell out good money, as in Tanzbar 2 money, I’d go for a Tanzbar Lite & Tanzmaus combo. You’ll get all the good stuff from the Tanzbar I, some samples to boost through the Tanzmaus, a more solid hardware and a pretty neat package. And the Maus and Lite have a few tricks up their sleeve, the Tanzbar I don’t. LFO’s and stuff.
should you want more direction, I guess this one says something as well:
Too expensive for my purpose, but it’s nice that it lowered the prices for its predecessor 
I do enjoy making drums, for sure.