Different kinds of product: one is active with its amplifier built in, the other passive and needs one. Judge them on how you want to own the system, not just the specs.
| Area | Better | Why |
|---|
| Bass | A | Fyne Audio F1-8 digs deeper - 33Hz against 55Hz. |
| What you buy | depends | ATC SCM20ASL is a complete system - just add a source. Fyne Audio F1-8 also needs an amplifier: more money and another box, but you choose it. |
| Connections | depends | With Fyne Audio F1-8 that all comes from the amplifier you pair it with. |
| Upgrade path | depends | Fyne Audio F1-8 can be re-amped later and outlive several amplifiers; ATC SCM20ASL ages as one unit. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Cabinet | depends | Ported vs Sealed. Sealed is tighter and happier near a wall; ported digs lower but wants space behind it. |
| Price | evenly matched | Much the same money ($10,499 vs $10,999 a pair) - though the passive pair still needs an amplifier. |
A Fyne Audio F1-8 B ATC SCM20ASL
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 speakers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
ATC SCM20ASL suits you if you want one box, ready to play, with nothing else to buy. Fyne Audio F1-8 suits you if you already have an amplifier, want to choose the electronics, or expect to upgrade in stages. Neither is the better speaker in the abstract. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 55Hz anyway, so judge these on the other rows instead.
And remember what a spec sheet cannot show: how each looks in your room and whether the finish suits it, what dealer support and warranty are like where you live, and how they actually sound to you. If you can hear them first - ideally with your own music - that will tell you more than any number above.