I think Assoluta smells like Old Grandparents. The Original Colonia is WAY better! I actually like the whole Acqua Di Parma line (Cipresso, Colonia, Iris Noble, Mandorlo, Arancia) the only one i hate is Assoluta.
I love Colonia, but Assoluta is great too. My preference simply lies with Colonia, with the subtle rose note which comes wafting at you. Best to apply to the back of the hands to experience this BTW. Many people contend colonia doesn't last with them, however I have found that it lasts on me. Assoluta is certainly stronger, I recall it had a persistent citric note.