I have both Klipsch Forte IIIs (99 dB sensitive) and Focal Aria 926 (91.5 dB) in my reference system. Two tube amps, a Willsenton 300i 845 that’s 23 wpc (the beast) and Inspire KT88 SEP that puts out 10 wpc (the angel). With the Klipsch I can only get the Willsenton to 9 o’clock on volume pot, the Focals to 10. Higher levels with the Inspire, point being you don’t need a lot of power if running a well built tube amp with high sensitivity speakers.
I haven’t hooked up my SS Crown DC 300 to the Klipsch or Focals, but it’s 150 wpc and drives a pair of vintage 4 way Infinity speakers that are 90 dB sensitive. Different sound, tight, quick, lots of low end bass and midbass with gain set at 6 and volume on the preamp at 11 o’clock. Just highlighting the distinction between choosing tube power vs SS. I like both, but for different reasons, different music and different moods.
In summary, the Focals have an “audiophile sound”, very articulate, detailed, precise, yet smooth with decent bass and no fatigue even after hours of listening. Excellent soundstage with tight precision, vocals are perfectly placed in the middle of the sound image.
The Klpisch are loud, in your face, sitting in the front row of a live performance with huge soundstage and separation of instruments and vocals. Much higher and wider stereo image, superb midrange and treble extension with the horn loading. Good warm bass but not floor thumping, Yet at low volume levels with the Inspire KT88 driving the Klipsch, there is a warm, enveloping engagement of the music, just heavenly like there are angels in the room. The speakers disappear and you feel like you’re in the middle of the stage with the musicians yet can carry on a conversation. It’s truly a unique experience.
At low volume levels, the Focals sound the same as higher, just not as loud. Very neutral and linear with increasing/decreasing volumes whereas the Klipsch take on different personalities based on volume levels, much more dynamic. Beautiful low level listening and concert like at high volumes.
Suggest you demo both, hopefully in your own listening room, and decide which sound signature you’re seeking. As noted above your amplification source can impact the sound signature significantly with tubes being more warmish and fluid and SS having more speed and punch.
For what it’s worth, I started with the Klipsch and added the Focals later to have both in my setup. Hard to go wrong with either, like between choosing to drive a BMW 7 series or a Benz S class, both great rides, just different personalities.
Best of luck with your pursuit!