Far more RTs have been sold than RS models means.......
Come on, look at this from the side of BRP. The RT series is by FAR the number one selling Spyder. The RT is the heaviest model as well. To put the new engine in the RT means they will sell a bunch of units to CURRENT RT owners. No need to go find new buyers. They have many years of RT owners who will step up and buy a new unit. Putting the new engine in the RT will result in far more sales than if it was put into an RS. Figure maybe next year it could make it into an ST Limited, that would make sense. The power and range capability just plain are more logical for the RT, but this was much more of a marketing decision to offer all of the RT owners something to upgrade to. RTs out number the RS/STs by what, 4:1 or 5:1 or even more? Simple economics. I know many dealers sell 10 RTs for every one RS they sell. So yes, the RS crowd just does not rate, it is all in the numbers.
As for the motor, ski-doo has had an in-line 1200cc triple for many years and that engine is awesome, reliable as a hammer, really durable. Being this new 1330 is an ACE technology engine it will be even smoother, cleaner and reliable with less service required.