I expect exactly what I said. A $499 option with no disc, $599 with one.
They will need to be careful not to make PS6 underpowered compared to PS5 Pro but also not to make the Pro look like a complete rip-off in comparison.
Although perhaps the latter is the key, they discovered the same truth Apple knows, some fans do not mind being ripped off to have the latest and greatest early. Actually some enjoy the higher price to sort of separate the few elite from the rest, getting the high priced entry preview to the road to PS6 sort of.
It might work, sort of like PS6 Pro being priced high compared to PS7 and still being eclipsed by PS7 a few years later.
PS5 Pro commanding a premium (on exponential scale) for bringing a preview of PS6 tech (AI, next-gen RT, etc…) and bruteforcing the console overall (while delivering a smaller and lighter package compared to PS5, this bit is still mind blowing) thus commanding a premium.
PS6 is where they afford a clean architecture break or more of a discontinuity with BC support being a bit more in software than in HW: you can expect for the PS6 console to run PS5 and PS5 Pro titles as good if not usually clearly better than on those machines but to possibly choose a very different set of architectural constraints: new CPU architecture (different arch, different clock speed, different arrangement of cores, extended ISA, etc…), new memory hierarchy (maybe 3D VCache for the whole SoC), new co-processors/custom HW, and new GPU family, etc…
I think the $399-499 no Disc drive and $499-599w/ Disc drive are the two main SKUs for PS6 with no other meaningful HW difference (the XSX and XSS models choice was not particularly good of a choice IMHO). Maybe for the embedded internal SSD the two models may differ with Sony selling a more expensive model with a larger SSD (heck they could disable 8K output in the base model just to segment their product line better). This would still allow them to sell a PS6 Pro later.