What were your old pairs and what are your new ones? What kind of difference did you notice?
I am going climbing tomorrow night as well. Did a full day indoor session on Saturday for the first time (only did 2-3 hours sessions since I started climbing a few months ago) and I felt the good sort of ache yesterday. Today, I woke up with a sore and stiff left shoulder, unlike anything I ever experienced before. It wasn't exactly painful. It got better through the day though. I think I can climb tomorrow and am hoping to wake up without any shoulder issues.