Siblings in Revel's Architectural series, so they share a family sound. It comes down to size, output and price.
| Area | Better | Why |
|---|
| Amplifier needs | B | Revel W553L is more sensitive (90dB vs 86dB), so it goes louder on the same amplifier. |
| Headroom | evenly matched | Similar power handling (150W vs 150W). |
| Size | depends | Revel W553L is easier to place; Revel W873 is bigger, which usually goes with fuller bass. Your room decides. |
| Type | depends | A Passive In-wall against a Passive Center Channel - a different job rather than a better one. |
| Price | B | Revel W553L is cheaper - $545 against $900, about 39% less; arguably a different class. |
A Revel W873 B Revel W553L
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?
Revel W553L has the edge on paper, though the margin is not large. The rows marked "depends" may matter more to you than the score does. In a large or open-plan room, Revel W873 has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, Revel W553L is the easier speaker to get right. If your amplifier is modest, vintage or valve-based, Revel W553L is the safer partner - the other will want more current or more watts to sound its best.
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.