Ortofon Concorde EC10 - what have I got here?

Does anyone know anything about this cartridge? I bought it 2nd hand recently from a (very helpful) gent Stateside. He said "It's similar to the DJ version but it has a lower load impedance and comes with an elliptical stylus meant for hi-fi use" I've now got it in my Technics with a OM5 stylus from another cartridge (the original stylus was worn) so I could give it a try.