I have the issue, they gave it a 10 because it's one of the few Platformers that approacch actual mario levels in gameplay, fun factor and clever level design. They say it's a genuinely fantastic game and really has only mario as true comparison in the 3D Platformer genre.
They even literally said that it could be mistaken for a Mario game with minor adjustments. I don't get these remarks to justify Edge giving the score like "it's because nostalgia" or "they gave it a 10 because it's on PlayStation, if it was on Switch it wouldn't get a 10" like no, none of these are the reason. Edge even wrote a second page saying that ASTRO BOT shouldn't rely on PlayStation iconography as he deserves his own full fledged game without nostalgia references. Edge already Scored non mario platformers on Nintendo Switch or even Nintendo systems. They gave Kirby a 7(or an 8 i have to check it out) saying it's good Platformer but not touching mario levels. They're genuinely saying as game ASTRO BOT is close to Mario. It's just a very good game, that's it.