Both are pretty fun. I actually hate tennis, but these games are addictive, I also love the way that if you play and win the majority of tournaments you get like a pait of shoes. xD Oooh personalising your grunt is also good ;] Hahaha.
i say they are both rubbish unless played on the wii, its jus boring playing with a ps3 or 360 pad, more fun to 'accidently' hit ur friend with the wii controller and win