First impressions:
The Kenner inspired box is so nostalgic.
The sculpt looks great to me. It's wider and slightly lighter than Sideshow's Skiff Guard head.
Removing his trousers, to try the old Sideshow pair, revealed that his shirt has an elasticated strap that goes between his legs to keep it pulled down. That's an old Sideshow trick I've rarely seen since.
The HT trousers are far too narrow legged, whereas Sideshow's are genuine bell bottoms. The old pair fit fine for both length, and waist in spite of the ample padding the HT has. This surprised me considering the Prometheus 1.0 was a skinny little body.
The colour differs quite a bit. The Hot Toys are a very dark blue/black, whereas Sideshow's are navy blue and closer to the colour of the Billy Dee Williams costume stills.
Hot Toys' blaster is tiny compared to Sideshow's, and ultra glossy.
Now to put his boots back on and see how he looks.