Sorry for being late to the argument er... debate? But I thought I'd share some of the insights I gained during my buying process.
We Ohioans seem to be a little more spoiled in Civic availability (at least we were at the beginning of 2022) and I got the chance to check out a 6MT Sport Touring (Sonic Grey) and a 2020 and 2022 Si's (White and Sonic Grey, respectively) with a dealership selling at MSRP. The only car I didn't get to drive was the 2022 Si. The ST Civic was great, and I particularly like it with the HPD package. It may not be functional, but it's a great-looking add-on spoiler, in my opinion. As for the transmission, it is (and felt) very different from the 2020 Si. The throws were noticeably longer, the gate was wider/looser--overall, it felt much less connected. SavageGeese did a review of an Accord in 6MT (Redline might've as well) and their takeaways on the transmission were similar to mine from the Civic. It was a test drive, so I didn't drive it in a spirited manner, but others have gone deep into the benefits of the LSD and I think it's worthwhile to have one, depending on how you intend to drive.
Personally, I wanted a Civic Si (mainly for nostalgia) but couldn't get beyond how many features were cut from the 2022 model compared to the 2020 model. The interior of each Si also felt much more economy-class than the ST, and that was hard to look beyond. The shifter in the 2020 model felt great, and reviews of the 2022 Si shifter have unanimously said it is as good/better. I could've bought the 2020 Si with 12,000 miles for ~$31,000 (love those used car markups) with the Certified warranty, or the 2022 Si with 0 miles at MSRP. I ultimately decided to wait a few extra months for the 6MT Integra, For me, the MSRP price difference between the Si and the Integra was worth it given the extra features. I think you'd have to be crazy to pay $35k+ for the 2022 Si when it seems relatively easy to get the Integra at MSRP.
In hindsight, I would've taken the Si home and driven it for a few months had I known I could've traded it in for more than its purchase price, but still would've aimed to land in the Integra.