Siblings in Polk Audio's Reserve series, so they share a family sound. It comes down to size, output and price.
| Area | Better | Why |
|---|
| Bass | B | Polk R200 digs deeper - 51Hz against 70Hz. |
| Amplifier needs | evenly matched | Similar sensitivity (86dB vs 86dB) - both want much the same power. |
| Size | depends | Polk Audio Reserve R900 is easier to place; Polk R200 is bigger, which usually goes with fuller bass. Your room decides. |
| Type | depends | A Passive Surround against a Passive Bookshelf - a different job rather than a better one. |
| Price | A | Polk Audio Reserve R900 is cheaper - $599 against $749, about 20% less. |
A Polk Audio Reserve R900 B Polk R200
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: Polk R200 measures better, Polk Audio Reserve R900 costs about about 25% 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 70Hz anyway, which makes the cheaper Polk Audio Reserve R900 much easier to justify. In a large or open-plan room, Polk R200 has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, Polk Audio Reserve R900 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.