I was hoping you spector nuts could help me out a little here.
What are the sonic differences between the NS5CRFM and the Legend Custom? I've played my NS5CRFM for hundreds of hours and listened to the Legend Custom for hundreds of hours and just can't see any justifiable difference. I played a Legend Classic at a local store here and the playability wasn't too off. Craftsmanship was noticeable though.
You basically answered your own question at the end there. The main difference is that our Korean-made instruments are production-line instruments. Whereas our Czech factory has an enormous amount of custom-hand work involved.
The Legend Customs, which have been discontinued, BTW... are set neck design. Which allows for a lot of sustain, but the NS5CRFM is neck-thru. And really that's the ultimate when talking about sustain.
Both are great instruments, don't get me wrong. And I'd put either up against any other manufacturer's product in the same price range. But the comparison against each other, I think the quality of materials and the hand-built aspects of the Czech models will always make them superior to the Korean production models.
Sonically, the difference in materials, the fact that the Legends are passive pup/active tone control whereas the Euro models are active/active... and the type of tone system, EMG (made for us) in the Legend Custom or depending on which year your NS5CRFM was made it might have one or another tone control (Phat is the acknowledged expert on those models in these here parts).
All SPECTOR® are designed to have a tone close to that "classic" SPECTOR® NS-2 sound. But some are closer than others.
My thing is that I've rarely heard a SPECTOR® that didn't sound good. The variable usually are the amp and the player. Our new Performer by SPECTOR® models which are passive/passive sound fat and have a nice tone (when running though several thousand dollars worth of top-of-the-line Aguilar equipment).
Sorry to run in circles. But I think the quality of the construction and the materials used should be the main source of any tonal differences you hear in the two models discussed here.