I would like to know this because i am making a machina gadget deck and people have told me the budget ones suck. So i want to know the diffrence. Also could you include what cards are found in a nonbudget machina gadget deck
A budget one wouldn't have the key cards (mainly for side-decking) such as Thunder King Rai-oh, Doomcaliber Knight and Banisher of the Radiance. A budget one may also not be able to get 3 structure decks, missing out on 3 Gearframe and 3 fortress.
It may also not contain staples such as Solemn Warning, Solemn Judgment, Mirror Force and Forbidden Lance.
It could be that non-budget ones use cards like Pot of Duality, or Solemn Warning.
Also, possibly, a good Extra deck or Sideboard cards can add to the expenses.