I'll go ahead and chime in.
I think comparing Cedar Point and KI might be like comparing apples to oranges, however, each park has something different to offer. Overall, I think Kings Island has a better overall coaster collection, however, Cedar Point has some unique coasters that KI does not have* (Millennium Force, Wicked Twister, Steel Vengeance, Rougarou, Maverick and even Valravn come to mind). As for entertainment such as shows and the like, KI has the edge overall (I generally like most of the shows KI puts on, including the music reviews and Cirque), although CP has Forbidden Frontier, which was amazing! The only other show I saw at CP was Vertical Impact and that was cool, but it was a bit too much sensory overload. Also, don't forget that KI has Haunt, Winterfest and Grand Carnivale in addition to all the other live shows that go on (I have not been to Halloweekends, so can't give a comparison to KI's Haunt - from what I've seen, though, it looks cool; especially how their Slaughterhouse is near their Barnyard, (insert evil smirk here), plus Blood on the Bayou looks interesting due to the swampy setting).
Overall, I think KI has the home park advantage for me (pre-COVID, I was probably going just about every - every other weekend), but I do try to visit CP often to ride their epic coasters that can't be found anywhere else.
As a final note, Hersheypark also has a great coaster collection, but I remember being surprised that they didn't have nightly fireworks... guess KI has spoiled me!
*NOTE I have not yet ridden Orion.
EDIT: To add to what someone said about CP being a concrete jungle: yes most of it is midways and rides, however Frontier Trail (the area where you are walking through the woods) and the adjoining Adventure Island (housed Dinos and Forbidden Frontier) are the outliers that provide a really cool environment to walk through. Other unique areas of the park include Frontier Town (where Maverick and Steel Vengeance are), parts of Gemini Midway and the little beachfront hideaway area where Wicked Twister, Maxair, Giant Wheel and GateKeeper's entrance are (also, that arcade is huge!). What I'm trying to say is, CP has it's own unique charm (aside from coasters and pathways), you just have to know where to look.