Yes and no, with models like Stable Diffusion the team behind it has released metrics so you can see even on paper that the model has better performance than Dalle 2 (SD has a lower MS-COCO FID so it's better). For models like Midjourney there are no metrics, but the difference in quality is so big that there is no real need if you just want to know which model is better. On a high level, Dalle 2 is worse because it generates a lot of artifacts, no details whatsoever, it has a fixed resolution and aspect ratio, and the fact that the model is proprietary means that you can only do what is available in the frontend and API, and there is not much.

I'm snarking on this guy because I don't care which model we're talking about. Stability might perform better in whatever quantitative metric we want to use, I just think using models like this also makes you a hack that doesn't understand or care about making things.