First you need to understand how they are fundamentally different technologies (ARA and VST). Then, you’ll answer all your own questions… It’ll be fun.! 
Oh, I see that @Big K has done a nice job in helping point you to some great info - you don’t have to lift a finger; sit back and enjoy - even more fun.! 
(and of course, all this is doing is keeping the topic at the head of the queue - maybe that’s the real point… 
)