any difference Premiere Q and standard 4 tuner Premiere?

I am in the process of updating a spare lifetime tivo premier 4 tuner model (750500). It's been sitting for over a year so it will take a while.

Along the way, I noticed this is a standard 4 tuner premiere while the main 4 tuner premiere I use in the family room is a Premiere Q model, which also appears to be a 750xxx model.

Except for some initial configuration issues, the Premiere Q has worked well for the past 1 1/2 years it's been in use. I'm with comcast / xfinity; it appears the Q...

any difference Premiere Q and standard 4 tuner Premiere?

any difference Premiere Q and standard 4 tuner Premiere?