If I may, the perception of the bass being fuller is an aspect of tonality versus simply output. A thicker, more plump bass, versus leaner bass, will strike the ear as being more prominent. Ergo, it is not that counter-intuitive when you realize how the tonality influences the perception. It is a surprise initially, but once you know how it works, you can use that to advantage in building systems to suit your taste.
If you wish to consider upgrading the Apple Mac Mini at some point, you can follow my path, which covers the Wolf Audio server/streamer, the Salk Audio server/streamer, and now the Small Green Computer sonicTransporter in combination with the SONORE Signature Rendu SE with systemOptique (fiber optic) - all reviewed for Dagogo.com
I use the two amps separately. If I am babysitting I use the Pass and at night without the kids, I use the Carys. The signal path capacitors in the Cary have been upgraded to V-Cap CuTF capacitors. I highly recommend this upgrade. With the upgrade, the amps sound similar. Both amps provide the same amount of musical detail but the Pass sounds crisper. They have similar tonality, sound stage width, and depth. The biggest difference is in the bass. My perception is that the Carys have a fuller-sounding bass. I found this interesting so I measured the system frequency response using both amps. With the Carys, The range from 58 to 128 hertz is down by 1 ½ to 2 decibels. It seems counter-intuitive that less bass output results in a fuller-sounding bass. I prefer the Cary to the Pass but I could happily live with either one.
Congratulations on the retirement! That means tons of time to enjoy the music. I like how you have the space transition from music only to home theater. Nice components and a very nice chair too! Have a great time and enjoy your music.