Both have a single component video input, and also a 12 volt screen trigger, and a standard analog computer input.
In summary: Excellent placement flexibility, motorized everything, excellent physical appearance.
Comparing the Projector's Picture Quality
It makes a difference. No really significant differences though. The RS35's black level performance is better than the RS25's but it is slight. I didn't have the RS25 and RS35 at the same time. I was able to determine the RS35's advantage by having extensively compared the RS25 to my RS20, then the RS35 to my RS20. I found the difference between the RS25 and my RS20, to be less than between mine and the RS35. In fact I would say the RS35 beat the RS25, by more than the RS25 beat my RS20.
Whoa, this is starting to read like "who's on first?"
Color accuracy was comparable on both projectors. They both calibrated slightly differently and looked a touch different, but they are obviously "the same projector". They were also slightly different when comparing their THX modes. I'll therefore assume any really minor color differences are the result of the lamps. On that note, hand picked components or not, this RS35 measured a little less bright than the RS25.
The first four images below, were taken while using the RS35.