ACD vs. SGX power?

So, the battle of two heavyweights.  which is the more capable of 
the two?  Can the SGX games be handled by the ACD format?  Can SGX 
games be converted to ACD format?  (What a great thing that would be to 
have Aldynes on an ACD).    In making this comparison, be technical, but please let it make 
sense to a techy dumby like me.    btw, i noticed that Magic Engine has SGX ability.  Where can roms be 
found for that?