think of the TR as a little baby triton. It's the same sound engine stripped down for most of its greatness.
The biggest of which are the insert effects. TR has only ONE IFX for all 8 tracks which leads to sound deformation because only 1 of 8 sounds has
it's original settings (chorus, reverb, effects...etc). the rest of them
have the effects of the first one so sounds in "COMBI" mode won't sound the
same as in "PROGRAM" mode.
The screen is smaller, and the menus are complicated, but once you get
used to it it's OK, but it takes a lot of programming to setup it right the way you want.
Korg TR is officially NOT a triton, and did I mention it has a lousy piano sample?
Oh wait... I did... (in every post where it comes to TR

)