The Sakura is light years ahead of the dated TT01, far too many reasons to list, but I will list my biggest pain points with the TT01:
1) Friction shocks, seriously first upgrade necessary will be oil filled shocks
2) No sealed diffs, no idea how to upgrade to sealed diffs, this is a deal breaker to me, however you can at least lock the rear diff for drifting
3) Battery tray needs to be modified in order to fit traditional LiPo packs
4) Included ESC has LVC for LiFe not LiPo... serious fail by Tamiya
Do yourself a favor and buy the Sakura, it will be far less painful.