rrb1399

so i recently got taken advantage of and im a dummy screwed out of 500$ needless to say i purchased both of these buggy's the 2.0 is complete and i sent more money for the newer version i believe the new rtr is based off the 4.0 so my question is which chassis should i really put my money into i plan on getting both up and running but the 4.0 was sent to me stripped hence i was screwed so should i transfer over the 2.0 aluminum shocks and all adjustable components or keep the 2.0 where its at and upgrade from there ? to be honest im not fond of the way the 4.0 has the throttle servo linkage so any opinions would be appreciated