Notes on Mac … still not something I should have done.

Could somebody please explain that to me?
When I open a contact document in my CRM system by clicking on it, it takes about 10 seconds to open and another 2 to change it to edit mode.
If I open it with cmd-e, I get there within 2 seconds. Now that was on the mac. With windows 7 in Fusion, it takes about 5 seconds by clicking on it but it is not as fast as the mac, if I use the keyboard.
We are talking about the mac being faster with the key board then with the mouse and the mac is known as the machine for the mouse addicted. I would really like to know, where the big difference comes from, between using the keyboard and the mouse.