dspic30 is a 5V chip - all clones will support it
dspic33 and pic24 are 3.3V chips (3.6V max) - only clones with level conversion support them (potyo2), but some people say, that 5V clones also do - the PGC, PGD and MCLR lines are sometimes 5V tollerant (only those pins, which have no ADCs multiplexed)...
i can tell only for myself - potyo2 supports dspic33 and pic24 without any problems.