SDI degradation in vMix?

If I have a camera with an SDI out at 1080i59.94 and I bring it into vMix via a DecLink card with vMix set to a master frame rate of NTSC 59.94 and output of 1080. I then take that input and I output it via External to the DecLink card (1080i59.94 verified) and then connect that sdi port into a hyperdeck.

Assuming the SDI cables are perfect and it is an uncompressed recording, would the hyperdeck recording from vMix be in any way degraded versus a recording of the camera plugged directly into the hyperdeck?

And if yes, is there any way to reduce the degradation?