I had both... AFC is easier to tune. Moving the arrow buttons is easier. AFC has partial throttle. Looks better
AFR has idle control. Way cool if u want lean your car out at idle. 11 ne points so u can adjust more across the rpm. The afc has 8 but 8 is plenty for our cars. AFR has response knob. The afr is pretty much a cheaper version of the vpc. Both EIDS and AFC's bov venting doesn't work! Jarrett couldn't get either units to work without stalling my car on my single. Mounts easier.
both work well... www.german-autowerks.com has them both for under $300 so either way u go, you'll be fine. I would go with an afr if i didn't go with a vpc. afc is i was going to get a vpc.