Software-wise, the two are identical. But the good news is that Access has released OS4, which not only adds many interesting features, but it's also more stable. Not to mention that it finally works on x64 systems. The Ti2 is just slightly faster and it can better handle multi-timbral complex patches, but if you're playing/recording one/two patches at a time, you might as well consider a used Ti or even a Snow and save a bundle.
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