From what I've seen so far, Imagen is more "straightforward" and does a better job generating an image describing the text than DALE-2. But DALE-2 seems to be producing prettier images (which makes sense given it was fine-tuned for aesthetics),
There's a Github repo up already, so I hope we'll be able to try an Open source version and actually test on the same prompts as DALE-2.
https://imagen.research.google/
Scaling the text encoder gives Imagen the ability to spell, count, and assign colors and properties to distinct objects in the image that DALL-E2 was not so great at. It looks visually about as photorealistic as DALL-E2 from the small set of sample images. Eyes are still weird.