march of the machine mtg commander decks Amazon.com: Magic: Gathering The Deck Bundle – Includes All 5 : Toys & Games 10 specialty cards March of the Machine Deluxe

All of these differences dont mean anything to the mechanics of the game

If you have a ton of small equipped creatures, you should be attacking with them, generally speaking

Each have their own strengths and weaknesses, and I think there's a decent argument for having any of them as your commander: Szarekh, the Silent King is the face commander of the precon and gets a bad rep from the community for being "bad" when in reality it's the best commander for the stock list

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With the new world order pushing the power level of creatures, planeswalkers, and threats in general so hard in the last five years, getting ahead on mana and on the board is critically important, and not much does that better than a turn one mana creature