There are many differences, the original run models were detailed here, and then the upgrades, before 1.5 and TM2 were announced...
Apparently it can also mean ocean grown when referring to Kush etc.
There actually was a TM OG that is different, technical terminology those are all TM, until we had the TM2 (and technically 1.5 lol) there were rolling upgrades, I have two different TM since they were bought a little over a year apart and my first was not long after they were initially released
So what is the deal exactly for sending in? I thought we had run out of time to do that before, so is that a special 420 deal?? How does it work exactly, and what was the end cost if you don't mind me asking?