PS Direct Stream Vs. Wyred 4 Sound Dac.

PS Direct Stream Vs. Wyred 4 Sound Dac.
Both of these Dac’s claim to be world beaters. I own the PS Dac but I wonder how the Wyred 4 Sound Dac compares.
Has anyone had any experience with these 2 Dac’s or point me in the direction of a review comparing them?

ozzy