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 | B | Triangle Borea BR03 digs deeper - 46Hz against 56Hz. |
| What you buy | depends | Triangle Borea BR03 BT is a complete system - just add a source. Triangle Borea BR03 also needs an amplifier: more money and another box, but you choose it. |
| Connections | depends | Triangle Borea BR03 BT has Bluetooth and phono built in. With Triangle Borea BR03 that all comes from the amplifier you pair it with. |
| Upgrade path | depends | Triangle Borea BR03 can be re-amped later and outlive several amplifiers; Triangle Borea BR03 BT ages as one unit. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | depends | Triangle Borea BR03 BT: a sub output. Triangle Borea BR03 sits in a wider range (11 models), so a matched surround system is easier later. |
| Price | evenly matched | Much the same money ($599 vs $629 a pair) - though the passive pair still needs an amplifier. |
A Triangle Borea BR03 BT B Triangle Borea BR03
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 BR03 BT suits you if you want one box, ready to play, with nothing else to buy. Triangle Borea BR03 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 56Hz 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.