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 | A | Triangle Borea BR02 BT digs deeper - 47Hz against 66Hz. |
| Built-in power | evenly matched | Similar onboard amplification (120W vs 100W RMS). |
| Connections | depends | Triangle Borea BR02 BT adds phono; ELAC Debut DCB41 adds HDMI. |
| Size | depends | ELAC Debut DCB41 is easier to place; Triangle Borea BR02 BT is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | depends | Triangle Borea BR02 BT: a sub output; ELAC Debut DCB41: a sub output. |
| Price | A | Triangle Borea BR02 BT is cheaper - $499 against $599, about 17% less. |
A Triangle Borea BR02 BT B ELAC Debut DCB41
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?
Triangle Borea BR02 BT has the edge on paper, though the margin is not large. The rows marked "depends" may matter more to you than the score does. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 66Hz anyway, so judge these on the other rows instead. In a large or open-plan room, Triangle Borea BR02 BT has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, ELAC Debut DCB41 is the easier speaker to get right.
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.