I think the problem I have with the finish of the scout is it looks less like desert weathering/grime and more like all the armor was left in an oven too long. More like lightly burned cookies than grimy.
And yeah, this Mando bike and the ROTJ bike are about 80-90% similar, but 10-20% different - there quite a few minor but noticeable detailing differences.
HT will need to revise quite a few things to turn this into an accurate ROTJ bike, and so it does make you wonder - after they've sold a lot of these, and the SSC ROTJ bike's been available all that time, will there be enough incentive to do a ROTJ bike?
People's assumption that HT will obviously do a ROTJ bike seems to be based on the idea of it being a simple repaint - but there's more than that. Or maybe HT wouldn't care - just release an 80-90% accurate ROTJ bike because nearly all of these minor differences nobody would really notice.
They couldn't be bothered to sculpt a properly warped helmet for the ROTJ Stormies so I doubt they'd make more complicated alterations to the already pricey speeder bikes. I'd love to be proven wrong of course.