I'm not sure you could say there's much in the way of a meaningful difference between the speakers especially considering the different measurement methods. It's been my experience that Focal's modern speakers all have a very similar sound to one another. Some differences here and there but they definitely have a 'house sound' imo (which is pretty neutral).
I also am not sure I'd take the manufacturer specs too seriously. For example, the Chora is rated to a little less bass extension and little less sensitivity, yet in
soundstage network's measurements, it actually appears to be the opposite, with the chora having a little more bass and virtually equal sensitivity, though the chora is ahead a smidge (87 vs 86.8).
Chora in Red, Aria in black. Even though soundstage network's measurements are not accurate below 100Hz or so, you can see the Chora is trending towards a bit more bass. Could all be measurement variation though. the aria was measured between the tweeter and woofer, vs the tweeter for the chora.
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Same as above, I woulnd't worry about that too much. I'd just make sure the speakers are precisely at the right height as the aria and chora are quite sensitivity to ear height (but being above the speaker is better than being below it).
The measurements are too close to call. Even in the preference score! Despite the difference in measurement technique, my preference scores for the Chora were
extremely similar to those of the Aria.
The Aria got a 5.6 standard, 7.9 with sub, and 8.1 with sub and using the listening window.
My measurements of the Chora get a 5.7 standard, 7.7 with sub, and 8.1 using the listening window lol.
Basically, pick whichever you think is prettiest lol.