For photography XT-3 hands down if youre not doing much videography. XT-3 does videography well too, IBIS correction can always be done in post processing. I'll pick Fujifilm color science over Sony's big time.

I shoot raw. I rather spend less time doing post processing work for photography for non-professional work. If you've handled a Fujifilm before you'll know you can do with little to no post processing with Fujifilm in most situations.

Not trying to spark a debate here. There's no way an APSC (XT-3) can outdo the sharpness levels of a full frame (A7III), but the XT-3 is no slouch either. Its a close second. Though Keep in mind that full frame lenses might take up a huge chunk off your budget if you opt for full frame in the long run, and full frame files takes up more space and more pc processing power too. Go and pick up both in a camera store and feel how it handles. You wont go wrong with either one.