[c-nsp] modular or not . ( 6500 IOS )

[Loc Pham]

  Greetings,
  I am looking at the Cisco d/l link ( www.cisco.com/go/fn ) and for a current kitchen-sink IOS :
-------- Modular -----------
Image Name     	 s72033-adventerprisek9_wan-vz.12.2-18.SXF8.bin
DRAM / Min Flash   	512 / 256

Enterprise Product Number   	
S733AEK9M-12218SXF
--------- "Non " modular 
	
Image Name   	s72033-adventerprisek9_wan-mz.12.2-18.SXF8.bin
DRAM / Min Flash   	512 / 128

Enterprise Product Number   	
S733AEK9-12218SXF
S763AEK9-12218SXF

 Two question coming up :
   There are all except one feature is with the " modular " image and it required more flash ? 
    What advantage of a modular and non modular that I REALLY gain ? ( outside of marketing talk ;- ) )))

  This is for our core box.

  TIA.
   Loc