manifolds swap over, the electrics seem to work much the same, have run 25neo de with all its elecs off an r32 25de ecu(changing cas & coil wiring, & a few plugs), ran mint-not saying this is the preferable way but shows elecs can work together, with both motors in good condition power result for same mods should be very similar, i've got a neo to replace a s1 when it dies which i'll use the same setup (300+kw) for back to back