The biggest difference between the two is that Megatronia's components each have black paired with another bold color. On the other hand Victorion has a unified color scheme. Some may find Megatronia's colors more exiting, while others prefer the matching look.
Megatronia has a lot of silver paint which collectors can truly appreciate. The shape of this mold makes her mirror Megatron as his more feminine counterpart quite nicely. The details of this figure look excellent in their metallic finish.
Each of the members of Megatronia's team has a different pattern than the Rust Renegades. The dark black makes the neon colors pop. This helps differentiate them so that they look more refreshing to those who might wish to own both.
I would like to take a moment to point out that it appears that the issue of Pyra Magna's miss-assembled knee joints possibly been corrected for Megatronia.
Feel free to discuss your favorite color scheme in the comments!