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 - 45W against 45W into 8 ohms is under 1dB, which is not an audible difference in loudness. |
| Grip on hard loads | evenly matched | Both behave much the same into 4 ohms - output increases modestly (60W and 65W). |
| Noise floor | B | LEAK Stereo 130 is the quieter design on paper - 108dB against 102dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | Both decode on board, but only LEAK Stereo 130 handles DSD. |
| Analogue inputs | A | Marantz PM6007 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 37% less shelf area (1115cm² against 1764cm²), and it is 60mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | A | Marantz PM6007 costs less - $899 against $995 at list. |
A Marantz PM6007 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?
The usual trade-off: LEAK Stereo 130 measures better, Marantz PM6007 costs about 10% less. With most speakers in most rooms that gap is smaller in practice than it looks here.
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.