Thanks lot for all your time spent, I have to say it was worth it!!!, at first I did some testing with 2 or 3 Hi Res songs but other than the borrowed kitchen sub being louder I couldn't really notice a huge difference, but then I picked a Hi Res song that I knew it had complexed bass with quick changes (Temptation by Diana Krall), there was a clear difference between how the SB could keep up with all the changes and still keep the bass tight and clean vs the muddy sound of the other one.
Below is my kitchen sub that I was using at the office, I just bought this used online without knowing anything about the brand or doing any research because the kitchen is an open space and I just wanted some base for the ceiling speakers, but it sounds ok.
Now about the dimensions, wow I couldn't have bought anything bigger, this is pretty much the limit of what I can have under the table and still looks a bit big.
As Pogre mentioned this definitely has a little bit less bass, but when I raise the volume in the SVS app, that fixed it and is the same as the other one, and the other one was a bit too much bass even though I always had knobs as you can see on the pic.
If I ever want more bass on a song, should I use the app to increase the subwoofer volume or should I do it on the bass button at the front of the receiver?