By what measure? Midjourney v5 is massively better with every prompt topic I've thrown at it than SD. It's not even close. SD, however, is much better if you want an actual customizable toolchain or to do things like train it on your own face/character.
A 1000 V-rolls won't get you there. For something like this control net combined with inpainting is indispensable. Not to mention the excessively heavy handed censorship in MJ.
Midjourney excels in overall quality, but it completely falls down if you have an actual complex vision.
Here have another prompt: "Rapunzel has let her hair all the way down a tower. The hero has been tied up by the witch, and annoyed at Rapunzel's continual attempts to escape, the witch throws the bottom of her hair into a paper shredder at the base of the tower."
You could v-roll until the heat death of the universe without even getting close.
Midjourney is great if all you're capable of conceiving is 90s Mad Magazine templatized mad Libs, banal crap like "Darth Vader as a French pantomime street artist".
Unfortunately that also describes the majority of midjourney users.
https://www.bing.com/images/create/a-monk-playing-chess-agai...
https://www.bing.com/images/create/a-blue-book-on-top-of-a-y...
Simple (prompt only) use of generative models is quite good at creating simple artistic pictures you might actually hang on a wall. Trying to create a complex scene with just a prompt seems still a few years off though.
https://paperswithcode.com/sota/text-to-image-generation-on-...
Parti and Imagen are still on top, followed by Dall-E 2.
If their model is so great, why are they afraid of benchmarks?
For a while I was using an FID variant for evaluation during training, but didn't find it very helpful vs just looking at output images.