Conflicted with Preamps

This post is a spinoff of these past two postings.

https://forum.audiogon.com/discussions/preamp-with-variable-loudness-control-remote-control

https://forum.audiogon.com/discussions/preamp-options-under-3500

(not sure if I posted the links correctly, please advise)

I ordered a New style Quad 33 preamp end of February or beginning of March. As of May 1st. No ship date on the Quad. In the meantime, a good deal came up on a McIntosh C49 Preamp so I purchased it. I always wanted to try the Mac sound. I kind of like this thing. The DAC seems a bit better than the Denafrips and I also eliminated the Schiit DAC from the TV. Now the issue, the Quad will be arriving sometime in the future. Do I open it and audition it, hoping I will like it better that the Mac or do I leave it sealed in the box and post it for sale? I am curious of the soundbut it might bring a bit more $ unopened.