Looking at the three, the Pro kit mainly has a few more tweezers, prying tools, and an ESD strap.

Are any of them absolutely necessary to console repairs? Probably not.

But would it cost you more than the extra $5 to add them later, most certainly.

Personally I think the idea of getting the Essentials later if you already plan to get the Mako not a good one. Half the Essentials kit is screw bits and the screwdriver, both of which you already would have in the Mako. If that was the plan, you'd honestly be better saving a few bucks and just getting a cheap prying set off Amazon like these for instance.