Edelbrock/Carter 800 AFB Or AVS?

I have a 750 Performer/AFB on my setup now.

I wanted to try and experiment with the 800 to see if there are any gains to be had with my combination.
Is there any advantage to the AVS / AVS2 other than the Cheaper price tag?

I have used the Performer series / AFB's for years with much success, but If I was to buy a new carb what are the advantages between one or the other?

Looking at the Edelbrock 1912 or the Edelbrock 1412.

Thanks, Sages!