I've got a team rts, no longer is it wearing m900 though, as I've modernised it slightly, first did an m970 build, but have gone back a few years and now it's m952 mostly. It's still a team rts frame though, which brings me back on topic.
I've owned a few rts bikes in my time, including the above team, an rts frame, a couple of rts-1s and back in the day (1992/3 iirc) an rts-2. The 2 aside, there weren't many differences in the actual frame, unless you count the rear end, as the older ones had a steel one, later versions alloy. The rear shock may have differred, can't remember exactly, but some didn't have the piggy back Noleen, but this could again be down to the year.
Both the team and 1 have flat caps and were made in the USA from 6061 alloy.
I'm sure someone will be along and correct any of the above, but that's my experience of these lovely frames, not sure I'll part with my team ever. Still have the full m900 if I ever need to sell it as a 'real' team, though I'm not a huge fan of the m900 shifting performance, and I've always upgraded anything that I didn't like or that wore out, so unless it's a catalogue spec that really makes a team a team, I guess mine isn't a team, although it really is, and bloody lovely it is and hopefully always will be.