Galliani comparing Ambrosini to Davids?

[acmonline news]
Adriano Galliani has today admitted that to hold on to Massimo Ambrosini, Milan has withdrawn from the race to sign Edgar Davids.
-----

I think these two players can't be compared to eachother. They are both good, but I think Davids is way better and could do more in the midfield for Milan than Ambrosini. I can't understand why Ambrosini's stay is stopping us signing Davids?

There are threads about both Ambro + Davids. No need to start a new one