Fidelity Research FR-64 vs. FR-54

It seems like even black 64fx is not so popular as 64s, i wish to know what's the difference between them?  

The FR54 is a much cheaper tonearm, so i assume it's not on the same level as 64s, not even close, right ? 

I've never tried. 

Question for FR64S owners:

If you ever need to replace the original silver tonearm wire (internally) which wire will be your choice? Talking about internal tonearm wire only. Let me know.

I got this problem with my Lustre GST-801 tonearm. When i finally manaed to expand the hole in my luxman armboard to mount Lustre, i was so disappointed when i realized the internal cable is broken. Then i had to disassemble the hole tonearm in pieces like i did with the AK-47 in high school. Actually a well build tonearm, but i have to buy new wires. AUDIO NOTE Silver tonearm wire is expensive ( abut 65 GBP for 500mm), i don’t want the VDh silver wire, but maybe i will just buy Cardas 4x33 AWG copper (12 GBP for 500mm) or Discovery Copper Wire (about 28 GBP for 500mm). Any tips ?

P.S. As for the external cable i was thinking about Signal Cable Silver Resolution when i thought my original internal Lustre Silver Wire is ok, but it’s not ok.

@nandric 

Dear chakster, You should write to my brother Don and ask where his Lustre is rewired. He got my Lustre 801 as present but the (silver) wire was broken in one of the channels. He is very happy with the result and prefer the Lustre above his Graham 2 (?) for the MC carts. 

oh, yes
I remember this story from Don. Just checked by mailbox now and you know i realized the answer is already there. Don has described full story from the start in september when i asked about external cable. Nice, so he had the same problem with old Lustre internally. Ok, his choice is Discovery Cable from Joseph De Phillip who rewired your ex Lustre silver with Discovery copper cable. That's good as it's medium priced copper litz.

@lewm 

 The Kenwood, nevertheless sounds fine, but could it be better with "better" wire?  This is what keeps us awake at night (for 5 minutes).

Haha, exactly.
It took at least 2-3 hrs to disassemble my Lustre 801 in parts for the first time, we did it. Internal tube damping doesn't looks like in the manual, but there is something inside for damping (Raul love it) in this armtube. I'm looking forward to try the arm with new wires. The magnetic tracking force works, but incorrect. I hope the magnetic (?) antiskating works, i have no idea how it works in this Lustre tonearm.     

This is crazy. Typical example how far the discussion can go from the original question in this topic.    

yeah, first it's was a topic, then it became a dialogue between 3-4 gentelments, on normal forums it's called off topic or free speach. I think we have no moderation here anymore, but something like "free speach thread" would be nice to remove stuff like that right there from each topics when people go too far from the original question. Actually i don't care, just a thoughts. Playin records from another room subject has nothing to do with FR54 vs.FR64 tonearms anyway.