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 | evenly matched | Similar sensitivity (89dB vs 88dB) - both want much the same power. |
| Headroom | A | Revel W990 takes more power (200W vs 100W) - more in hand in a big room. |
| Price | B | Revel W263 is cheaper - $420 against $4,240, about 90% less; arguably a different class. |
A Revel W990 B Revel W263
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 W990 is ahead, but only on 1 of the measured areas, and it costs about 10.1x the price. That is a lot of money for a narrow margin on paper - Revel W263 looks like the sensible buy unless something else about the Revel W990 appeals to you. Think about the whole system, not just the speakers: the roughly $3,820 saved by taking the cheaper pair would buy a subwoofer or a better amplifier, and either usually does more for the sound than the difference between these two.
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.