Its not any better performance wise just the info at ur finger tips is a plus nistune is just as good as a pfc. And is a plus incase of defects etc. just general info im giving as hes asking.
Nistune is usually a favourite becsuse of its stock appearance but i think pfc is the better performer. Its usually personal preferance really but just that the pfc has the ability to check sensors is a good reason to have one
A tuner will need to clear and start again as every engine and setup is different. What version pfc? Newest or old version? $950 is abit steep $850 is reasonable
Its a complete system. Shows all of your sensors and shows 8 different vitals of your choosing. Paulr33 did a detailed section on the pfc look it up on google. Type. " apexi pfc paulr33"