There are some Hideous differences between Magic and Elements which changes how the metagame is looked at.
1. 100 life 30 cards vs 20 life vs 60 cards. One of these environments is much more extreme meaning that a slight adjustment in a crads mechanical value can change the whole environment if measured correctly (Magic). The other is a brutes lounge area where you need to draw and put your muscle on the table and you're unlikely to win without it.
2. Draw Game vs Non-Draw Game. Magic cards and draw are designed to aid the Toolbox player they get what you need to fulfil the task you need to do. In any competition environment for magic less than 1% of drawn cards are redundant. In Elements your draw is limited to top deck and luck. To get an advantage you need to simply draw / mutate as much as possible and hope an answer comes into hand.
While those may be significant differences, I think you actually missed the most important difference between Magic and Elements, namely the fact that Magic allows you to REACT to every move your opponent makes whereas Elements is strictly turn-based(largely made necessary by the fact that elements was designed for online play where having to stop after each spell to see if anyone wished to respond would be almost impossible).
Whereas in Elements, a player simply draws a card, casts whatever spells they can, and then attacks, a turn in Magic will often be more like this:
Player A attempts to cast spell
player B counterspells
A counterspells the counterspell
B casts deflection changing the target of the original spell
Player A declares attack with 3 creatures
B unsummons 1, lightning bolts a second, killing it, and blocks the third with one of his own creatures
A attempts to cast a spell destroying the blocking creature, B responds by unsummoning it instead
etc.
The ability to react to every attempted move in this way gives non-creature spells much greater power in Magic than in Elements where a creature is normally guaranteed to get at least one attack in before the opponent even has a CHANCE to react to it being cast.
