Apexi S-AFC cannot adjust timing, it also only gives you a high throttle/low throttle map.
The Emanage allows you to adjust timing, as well as set fueling points for diffrent throttle points or boost points.
EMU lets you delete the MAF all tgoether, which really helps with lag. also gives you MANY more features.
Honestly, I never liked the way my car ran on a MAF-T / S-AFC setup.
I advice anyone who ever ask me to stay away from the S-AFC.