I am Italian,too but end users do not care about such thing
They simply want to purchase the best engine around or at least the one that most suit their needs

About the size of the team, this is an interesting topic
Why is it so important ?
First of all , I am not an artist, maybe I can not appreciate some graphic details but the demo's of all modern engines are, in my opinion, more or less equivalent
The skill of the artist is more important than the engine

The true differences are in term of:

01) FPS
02) Stability
03) Workflow
04) Comprehensive and exhaustive set of commands and tools

Here the size of the team plays an important role
I dont particulary like Unity but it is a matter of fact that it wins hands down as far as the above items are concerned
In my opinion a huge team is a must for the "optimization" of the features rather than the implementation of the features themselves
In other words
It is right to compare engines but you must play with them for some months of so before posting a review
Going through the list of features and watching demos can be deceiving