There's architectural differences, although I found Stable Cascade a bit underwhelming, while yes it can actual manage text, the text it does manage just looks

There's architectural differences, although I found Stable Cascade a bit underwhelming, while yes it can actual manage text, the text it does manage just looks like someone just wrote text over the image it doesn't feel integrated a lot of the time. SD3 seems to be more towards SOTA, not sure why Cascade took so long to get out, seemed to be up and running months ago