A generation apart: Klipsch The Fives II is the newer design, against a 2020 model. Newer is not automatically better, but the older one is more likely to be discounted or near run-out.
| Area | Better | Why |
|---|
| Bass | evenly matched | Much the same reach (50Hz vs 50Hz). |
| Connections | evenly matched | The same set of inputs and streaming options. |
| Size | depends | Klipsch The Fives is easier to place; Klipsch The Fives II is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | depends | Klipsch The Fives: a sub output; Klipsch The Fives II: a sub output. |
| Price | A | Klipsch The Fives is cheaper - $969 against $1,399, about 31% less. |
A Klipsch The Fives B Klipsch The Fives II
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?
Neither runs away with it - they trade advantages. Let the "depends" rows and your own room settle it. Think about the whole system, not just the speakers: the roughly $430 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.