Why would Rotel offer more "performance"?
Quite simply because they DO offer more performance.....especially on the 'amp' side of things.
I'll tell you about my experience............
For years I had high end Yamaha AVR's and was sold on them. Then, I had some money to blow on an upgrade and heard that Rotel amps were better. I also wanted DD and DTS decoding as well and my last Yammie was pro-logic only (High end though...cost me $1000 bucks). That was in the mid 90's though.
My Rotel cost twice what my Yamaha cost ($2k) and that was a big chunk of change for me but I bought it anyway. I was always under the impression that an amp was an amp and that it simply amplified a source. Watts were watts and that was it. Boy, was I wrong!!
From the moment I wired my Rotel up.......and it was rated at 75 watts/ch compared to my old Yamaha which was 100 watts/ch, the difference was immediate and striking!! The sound was immediate and forward....punchy.....piles of detail..... and the biggest difference was the dynamic 'headroom'. When a blast of power was needed (ie......cymbal crash or drum roll for music.......explosion for movies) it just delivered the power effortlessly. When I ask my Rotel to go from 2 channel stereo to 5ch stereo it says......"Sure no problem" and just does it effortlessly with no loss of volume or power delivery.
Trust me when I say that Rotel is a step up.........