Check in the archived threads forum, it's in there! I never think to check there either though.
Basically the Lo TRS is made of harder metal, has a screw in bar, and a bigger sustain block. And is used on mid-level Japaneise guitars. The TRS II is used on the high end Korean models. It's got a pop in bar like the Edge, but it has a tendency to wobble over time.
My advice is to avoid both. For some reason my NEW RG470 with a TRS refuses to hold the strings in the blocks during anything more than a half step bend. And when I took the bridge off the guitar to try to see what the problem was inside the blocks (I ended up sanded down the blocks , and that didnt work either) I couldn't find anything wrong with it. But the knife edges looked awful, and this is with the harder metal on the normal TRS. Just get an Edge model. Please.
But the TRS is better, and it seems like it works reasonably well for most people. Im the only one who ever has a problem with it!

I also think that TRS'es that work correctly get a really bad reputation from the TRS II.
But then again I was banking on that, and mine turned out to be an utter piece of CRAP. That guitar is useless until I can get an OFR or Edge on it.
