Doesn't seem like a fair comparison deciding based on the sequencer in them - the EII does a whole lot more than the JX-3P since it's multitimbral, but the 3P is still a fun synth.
That said, the EII sequencer has a LOT more memory than the JX-3P.
Fairlight IIx (Mid-Life Crisis - cheaper than a Corvette!)
Roland JP-8, D-50, S-50, S-550(2x), S-760(2x), JX-3P, JD-800
EII, Emax II, Minimoog, ARP 2600, P-5 Rev.1 (broken...), Pro-One, Crumar Performer, K1m, K5m, MS-2000B, Virus KC, a few other things.