the main difference is the vafc2 has more adjustable points 12 vs 8 for high and low throttle.. and the vafc2 can be used for I-vtec..

call around for prices.. when I bought mine, I asked a local shop if they would price match (which they did) and I was able to get it that day instead of worrying if it would come in one piece from ebay.. I had to pay taxes, but it would have been the same for shipping..