I have a POD 2.0 and the Tone Port - as indicated, the Tone Port is more comparible to the POT XT - but since the POD 2.0 has many of the same sound creation abilities - I would say the Tone Port can reproduce any sound the POD can.
The amp models should be exactly alike. If you buy the Gear Box Gold from MF for $99.00, it comes with the tone port DI and has every single model that Line 6 has.... it has many more than the Pod Xt live, and the same ones as the Pod X3.
I personally love mine, and have used it on tons of recordings.