No single best amplifier here. What decides it is what you have to drive, what you need to plug in, and how much of the system you want in one box.
| Area | Better | Why |
|---|
| Power | evenly matched | Effectively the same output - 50W against 45W into 8 ohms is under 1dB, which is not an audible difference in loudness. |
| Noise floor | B | LEAK Stereo 130 is the quieter design on paper - 108dB against 100dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | LEAK Stereo 130 has a DAC on board; the other needs an external one, which is another box, another power lead and another purchase. |
| Analogue inputs | A | Rotel A11 Tribute takes more analogue sources - 4 against 2. |
| Room to grow | evenly matched | The same expansion options on both. |
| Shelf space | depends | LEAK Stereo 130 takes up about 32% less shelf area (1115cm² against 1629cm²), and it is 38mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | A | Rotel A11 Tribute costs less - $800 against $995 at list. |
| Watts per dollar | A | Rotel A11 Tribute is the cheaper watt - about $16 per watt against $22. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Rotel A11 Tribute B LEAK Stereo 130
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both amplifiers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
Neither runs away with it - they trade advantages. Let the "depends" rows and the speakers you already own settle it. If you already own a DAC or a streamer, the built-in one is money you are paying twice for, and Rotel A11 Tribute becomes the more rational buy.
What a spec sheet cannot show: how either sounds with your speakers, how the controls feel day to day, and what the app is like to live with - which is where most all-in-one amplifiers are actually won or lost. Power figures are the manufacturers' own and are not measured to a common standard, so treat small differences as noise. If you can hear both, that will tell you more than any row above.