3DMark
If you care about 3DMark’s tests, you’re likely to be opting for a higher-end, benchmarking-calibre motherboard anyway. The performance differences here are slim and inconsequential to most general users.
Gaming
In terms of actual gaming, the MSI B650 Carbon WiFi was consistently a few frames per second slower than the X670E reference board in Borderlands 3. Performance was neck-and-neck in F1 2021, though, and Watch Dogs Legion was also roughly similar when factoring in accuracy margins.