The spec read from the original boxes .2508.
TDR. washable, air bail, 5 ball bearings, free extra spool.
TDX. digigear, 7 ball bearings incuding 4 CRBB?
one touch release spool, one touch folding handle, high impact protection line clip(which I have compared and the tdx clip is round and if you look inside the spool is mounted on a spring which makes it give a little when stressed).Free extra spool,gear ratio and line capacity are the same.. reel weights are slightly different TDR 265 gram . TDX 280 gram…….
I have both, and being a tackle tart I prefer to use the TDX ……….