I have owned the Dali OB. 7’s and now have Revel (Be series) in my main system. Whilst I have never auditioned the F series I MUCH prefer the Revel sound to the Dali’s. I had the 7’s in a second system and ended up selling them. I tried the Opticon 6 and never really warmed up to them either. I found the Dali sound to be kind of dull and too laid back for my tastes. I would say the Revel’s have a much livelier sound, not bright at all, just more “alive” and more airy and detailed. I would also agree the Revel’s have a huge edge in the bass dept.
I bought the Dali’s without auditioning figuring I loved the Dynaudio sound and both being Danish manufacturers (at the time Dynaudio was too expensive for a second system for me) figured they’d be similar but found that not to be the case…
Best of luck and remember to always enjoy the ride👍🏻