I dug up the manuals.
I could speculate about the compatibility but the fact is that the published documentation doesn't provide enough information to draw any hard conclusions. You could try powering the unit up and looking through the menus for the settings specified for the SAFC II... that's where I'd start.
SAFC II User's Manual http://www.apexi-usa.com/content/pdf6118.pdf
VAFC II User's Manual http://www.apexi-usa.com/content/pdf6132.pdf
Apex'i Wiring Diagrams and Manuals http://www.apexi-usa.com/info/?id=5383
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