I own a full-size SIG P320 in .45 caliber. I do not have any experience with the 2022 apart from handling a couple at the LGS.
I have encountered one or two 2022 owners at the range who really liked them. And I have also heard the 2022 described as "the worst gun SIG ever made", (also heard that said of the P250).
Although I only recently bought the P320 I have been researching the pistol for the better part of a year by perusing various forums and internet reviews. I shot a P320 .40 caliber full-size early in the year and liked it.
Based on what I have read I came to feel that the three top striker-fired, polymer-frame contenders currently on the market were the SIG P320, the HK VP series, and the Walther PPQ. I do not care too much for Glocks.
Like any new pistol there have been some who have disliked the P320 but in general the reviews have been very positive. My experience with the P320 .45 and the P320 .40 I shot earlier this year have been very good. The HK VPs were a close second. I have not had an opportunity to try the Walther PPQ as yet.
The finish on the P320 Nitron is a flat black. The polymer grip module looks about like any other polymer grip. In terms of finish the P320 is relatively Glock-like.
Within the year I will be shopping for a compact size 9 mm striker-fired, polymer frame pistol for carry purposes and the P320 compact will certainly be in the running.