The Mask Of Creation is like the forbidden fruit (or the golden fruit) that both give godlike powers to the one who gets it and granting the chance to dye the world in his/her image. The Mask Of Control is like the fake forbidden fruit which is not that powerful comparing to the first one. As for The Mask Of Ultimate Power,it's like the Yomotsu Heguri (Hell Fruit Lock Seed) that Professor Ryoma gave to Mitchy. However,it doesn't drain the user's life force,but takes over the user instead,which is the main difference.
The skull spiders are like the Inves,but taking off the virus that the Inves have. However,the Toa won't turn into the skull spiders,which is good. As for the Lord of Skull Spiders,it's like Roshuo,the Overlord King,except he thirsts for the power of The Mask Of Creation,instead of just needing it to save his wife(if he has one). However,he doesn't have the mask in hand. No skull spiders that represent Demushu,Redyue....etc,which is a bummer.
Each Toa's "Power Up" mode is kinda their Super Forms. Can't say they're Final Forms,because they're not really much of a difference from their original forms. Also,thanks to the golden colors the modes bring,it's actually like the Rising Forms of Kuuga.
Another fun fact I should add. Here are my thoughts of which Toa represents who in Gaim:
Onua:Knuckle (Thanks to his "digger claws")
Gali:No one(Can't really say Minato here.)
Sadly,there's currently no Toa that represents Kouta though.