I like how you can the progression of the suit's regeneration between upgrades
The Varia Suit's chest piece is bigger and not fragmented like the Power Suit's , and you can see the shoulderpads and arm protection almost finished growing back
The Chozo encountered by Samus earlier is not the general from the Chozo Memory, he is actually one of those who supervised the creation of the Metroids. We can see a 3D flashback of the events of SR-388 depicting him trying to escape with scientists.