dogo vs pit

i got sum pits . and a bulldog...they hunt ... but they ware down quick..in the heat... i heard dogos last longer then the others... iwant to get a dogo. and i think i found a guy that knows alot about them and said he will sell me one. and if it culls out .to bring it back and he will swopp it out...that a good business man.. there.... standing behind hes dogs and pups.... pits can be found a dime a dozen.. no body wants to spend that much on sumthing and it not work out... feels like u got ripped off if it dont work out....all dogs just need time and work thow......just my two cents