You don't say what you want to image - if it's the planets then the 9.25" SCT is better than the 8". If it's nebulae then a Newt/refractor is better. If it's galaxies then there's probably not a lot of difference between the 8 and 9.25.
I love my 9.25" on the planets, it produces
great images with a managable size and weight. It's significantly better than the 8. However, the high focal ratio makes it not ideal on dimmer objects.
But don't just take my word for it, Ed Ting's review.
https://www.youtube.com/watch?v=C6zsxiLvOwQ
Andrew