One is a streaming all-in-one and the other is an amplifier. Judge them on how many boxes you want and what you already own, not on the spec sheet alone.
| Area | Better | Why |
|---|
| Power | B | Roksan Attessa Integrated Amp has more power - 80W against 60W into 8 ohms. That is about 1.2dB, which is a small step in loudness but real headroom on peaks. |
| Room size | depends | We rate Primare I15 Prisma the better fit for desk or near-field listening and a small room, and Roksan Attessa Integrated Amp for a mid-size room, a large room and a very large room. Match the amplifier to the room you actually have, not the one you want. |
| Grip on hard loads | evenly matched | Both behave much the same into 4 ohms - output increases strongly (100W and 130W). |
| Noise floor | evenly matched | Much the same signal-to-noise ratio (97dB vs 98dB). |
| Built-in DAC | A | Both decode on board. Primare I15 Prisma goes higher - 768kHz against 192kHz. Very few recordings exist above 192kHz, so treat this as headroom, not as sound quality. |
| Streaming | A | Only Primare I15 Prisma has AirPlay 2, Chromecast and Roon. |
| Analogue inputs | B | Roksan Attessa Integrated Amp takes more analogue sources - 2 against 1. |
| Phono stage | depends | Roksan Attessa Integrated Amp has a built-in phono stage (MM) and Primare I15 Prisma does not. Decisive if you own a turntable, completely irrelevant if you do not - and an outboard phono stage is easy to add later either way. |
| Room to grow | evenly matched | The same expansion options on both. |
| Headphones | depends | Only Roksan Attessa Integrated Amp has a headphone output. Worth something if you listen late, nothing if you never do. |
| Amplifier class | depends | Primare I15 Prisma is Class D and Roksan Attessa Integrated Amp is Class A/B. Class D runs cool and draws almost nothing at idle; Class A/B runs warm and is the long-established mainstream choice. Modern examples of both measure well - judge by the rest of the page. |
| Shelf space | depends | Primare I15 Prisma takes up about 22% less shelf area (1387cm² against 1779cm²). |
| Price | evenly matched | Priced within a few per cent of each other. |
| Watts per dollar | B | Roksan Attessa Integrated Amp is the cheaper watt - about $26 per watt against $37. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Primare I15 Prisma B Roksan Attessa Integrated Amp
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?
Roksan Attessa Integrated Amp has the edge on paper, though not by much. The rows marked "depends" are more likely to decide this than the score is. If you play records, Roksan Attessa Integrated Amp saves you buying a phono stage; if you do not, ignore that row entirely.
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.