Last year I generated around 7,000 images using DALL·E 2 and uploaded them to https://generrated.com/
I've been re-running the same prompts using DALL·E 3, although haven't updated the site yet (although I'm planning to). So far I've created 2,000 like-for-like using those prompts.
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In the meantime, here are some things I've noticed with DALL·E 3 vs. DALL·E 2:
- the quality is astounding, especially illustrations (vs. photographs) — as I've been looking at the DALL·E 2 images I've constantly felt like the old images look like potatoes now we have DALL·E 3 and Midjourney (even though at the time they seemed stunning)
- you will struggle to get an output that references a specific artist, but it will sometimes offer to make images in the general style of the artist as a compromise
- it can get quite repetitive when you ask it for concepts — if you look at the 'representation of anxiety' images on Generrated, you'll see that there's a huge variety in them, but as I've been running them with DALL·E 3 it seems to prefer certain imagery (in this case, a human heart under stress appears a lot), and the 'discovery of gravity' will include a tree and an apple 80% of the time
- some of the prompts need guidance to get the output you desire — 'iconic logo symbol' works well on DALL·E 2 to create a logo, but with DALL·E 3 will often produce a general image/painting with a logo somewhere in the image (e.g. a NASA logo on an astronaut's suit rather than a logo of an astronaut)
Those are some I can remember off of the top of my head. But it's so much fun to play with!
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Edit: I quickly put together 3 comparisons between v2 and v3: https://imgur.com/a/L9DYCSA