How is Supratek Chardonnay compared to Cary SPL-98


I am currenly using a PrimaLuna Prologue 3, McCormack DNA-1 and B&W CDM9NT speaker.
Cary SLP 98 is one of the highly praised preamp and is always on next list when i am ready to upgrade. Recently, I learned about Supratek and read the rave reviews. Anyone used both can share how they compared?
And how are these 2 compared to the Prologue 3 I am using? They are about double the price, I wondering if it is worth the difference.

Thanks.
gte357s
It seems to me Supratek was not in business recently but have started manufacturing again. Cary has been in business for several years and seems steadier.

fwiw - something to consider...
Yes, this is one of my concern too. Since it is hand made, the quality control may varies. I am also afraid of getting hiss or hum. In the "deal of the century" thread, someone pointed out getting loud hum. By reading the reviews, i got an impression that Cary is great and I hardly seen any negative comment. The Supretak is a WOW, but the quality control is not as good