Marantz SA-10 vs SA-KI Ruby


Hi all,

wondering if anyone one can explain what makes the difference in these 2 players? (Other than balanced outputs on the SA-10). 

MSRP difference is $2k...

Do people think they should sound the same?

thanks!
leemaze
SA-10 spec sheet

SA-KI Ruby spec sheet

Curious - what do you think? Electrical engineers, how do the insides compare?

How do the claimed specs compare?

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I tried buying the SA-KI Ruby for my second system (single-ended) but in my country they are only sold as pair with PM-KI Ruby.  My regular hi-fi shop suggested I should get another SA-10 since the actual retail price is a lot lower than the list price.  The Ruby being limited edition, need to pay at list price or even higher.