Oh chucks..I always enjoyed your birdie pics behind the window..I'm sure they wont mind too much~~..I will be moving from here end of May and birdies will sadly lose their window views.
I would say Luca is a male Normal Grey – he has the yellow facial mask (if he was a female, he would only have a slightly yellow mask very much like the photo of him in your siggy). You will notice he will lose the barring on his tail, and it will be replaced with a solid grey color, too.
Here is a good photo that explains a bit more about the difference between the two.
Edit:
Another good one. (from here)