No single best speaker here - they are built to different priorities, and the right one depends on your room, your sources and what you listen to.
| Area | Better | Why |
|---|
| Bass | B | KEF Coda W digs deeper - 41Hz against 48Hz. A subwoofer would even that out. |
| Built-in power | A | ELAC Debut ConneX DCB61 has the bigger amplifier (160W vs 100W RMS). |
| Connections | B | KEF Coda W adds Bluetooth and digital inputs. |
| Size | depends | KEF Coda W is easier to place; ELAC Debut ConneX DCB61 is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | B | KEF Coda W: a sub output. |
| Price | A | ELAC Debut ConneX DCB61 is cheaper - $899 against $999, about 10% less. |
A ELAC Debut ConneX DCB61 B KEF Coda W
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?
The usual trade-off: KEF Coda W measures better, ELAC Debut ConneX DCB61 costs about about 11% more% less. Whether that gap is worth the money is the call only you can make - and in a normal room it is often smaller than the numbers suggest. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 48Hz anyway, which makes the cheaper ELAC Debut ConneX DCB61 much easier to justify.
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.