Do winter greens/tees make it easier or harder???

Our course has played longer than normal due to the lack of run on the ball. I've not played on a Winter Green since I joined 2 1/2 years ago and we always use normal tees, just mats on the par 3's. So it's normal course but no run. Makes it harder for us, hence the fact I've beaten handicap once this year so far, mostly buffer.....