I actually own both and was using them until about 4 years ago. I preferred the 210. My frames are graphically different from what you show here...the 210 has thin red and gray stripes starting at the grip and goes around the hoop. My 215 has stripes that do that also, but are green and black. The grips on both were originally white. Bought the 210 for about $20.00 in the early 90's at Big 5 and I think I got the 215 used for about $15.00. Compared to my current Prince rackets, these feel very heavy and dense.
I think I liked the 210 b/c it had power but maybe had more control due to the head size. I don't think I hit as firm a ball with the 215. May take them out for a spin this weekend.
Head, shoulders, knees and toes (knees and toes)....all of it hurts