How do the Yonex Ti-80 and MP Tour 1 98 compare to each other? I'm switching back to Yonex from a LM Prestige Mid. I'm looking for something a little less demanding than the LM Prestige Mid but still a Yonex players racket. I tried the RDX 500 Mid but it was too buttery feeling and underpowered. Also, is there any difference between the old Ti-80s and the new ones? I found the old ones for 70 dollars less than the new ones on another tennis website. Do both the old and new Ti-80s vary weights by grip size or is that only the old model?