A valve amplifier against a solid-state one. They are not really rivals: they differ in character, in what they will drive and in what owning them involves, so start there rather than with the watts.
| Area | Better | Why |
|---|
| Power | B | Cambridge Audio Evo 150 SE has more power - 150W against 120W into 8 ohms. That is about 1dB, which is a small step in loudness but real headroom on peaks. |
| Grip on hard loads | evenly matched | Both behave much the same into 4 ohms - output increases strongly (183W and 250W). |
| Built-in DAC | B | Both decode on board. Cambridge Audio Evo 150 SE goes higher - 384kHz against 192kHz. Very few recordings exist above 192kHz, so treat this as headroom, not as sound quality. |
| Streaming | B | Only Cambridge Audio Evo 150 SE has AirPlay 2, Chromecast and Roon. |
| Room to grow | A | Only Advance Paris A10 APEX offers a pre-out/main-in loop - which decides whether you can add a subwoofer or a power amplifier later without replacing the box. |
| Amplifier type | depends | Advance Paris A10 APEX is Hybrid and Cambridge Audio Evo 150 SE is Solid State. Valve designs are usually warmer and softer at the limits and need their tubes replaced eventually; solid state is the lower-maintenance choice. This is a taste and ownership decision, not a quality one. |
| Shelf space | depends | Cambridge Audio Evo 150 SE takes up about 33% less shelf area (1185cm² against 1762cm²), and it is 37mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | B | Cambridge Audio Evo 150 SE costs less - $3,299 against $3,499 at list. |
| Watts per dollar | B | Cambridge Audio Evo 150 SE is the cheaper watt - about $22 per watt against $29. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Advance Paris A10 APEX B Cambridge Audio Evo 150 SE
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?
Cambridge Audio Evo 150 SE has the edge on paper, though not by much. The rows marked "depends" are more likely to decide this than the score is.
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.