Howard Kneller at "The Listening Chair" has a two-part Youtube review for these products. They were posted about 6 months ago at his Youtube page. He liked both products very much.
However, there may be other ways to go that might be cheaper.
I built a Windows PC solely for digital music about 6 months ago, and I’m delighted with how it sounds in my system. For now, I’m running a USB cable from the PC motherboard to my DAC. I’d personally consider the JCAT cards, but I need to spend my money on other system improvements first.