Immediacy CMS got lost in an alphabet soup of A's, C's, M's, and P's. Someone must have decided it would be a cool idea to give 2 different products similar, all most identical names: CMC & CMP. In 2007 you would have known these products as Immediacy and Morello.

CM7 recipe

Take 1 Immediacy and add to marketing mix
Gently pour 1 Morello
Continue stirring until one marketing story has been created
Allow to rise in a warm market
Bake till nicely brown

Discard Immediacy residue which should compost quite nicely.

Can 2 go into 1?

If Immediacy were a car I reckon it would be a faithful old Morris Minor. Uncomplicated, trusted by many, some learnt to drive CMS software starting here. Basic. reliable. Typically British!

Morello on the other-hand has some deeply technical under-pinnings. But hey! It's powerful and it's sophisticated and therefore fundamentally different to Immediacy.

If you're used to utilitarian convenience perhaps Immediacy (CMC) was a comfortable option. If the upgrade offer is just too tempting — you might want to consider my thoughts about migrating content: http://johngoode.com/content-confusion. Can 2 go into 1? In a few circumstances the upgrade will mean a welcome addition to the drive-way.