Tweeter: Recessed vs Flush mount

Just wondering. As I last year was looking at tweeter mounting ideas in case the new set I end up buying ( Polk db 6501 component set) didn't have the necessary hardware brackets, I noticed that this one guy made a bracket out of vinyl siding or a gasket making material. Now that I have mounted mine and just started with the complete installation, I revisited the link I had saved to reference when I did start my new system. I'm wondering why he chose to make a bracket and I'm thinking that even if you just buy a set of tweeters, they should come with the housing for the tweeter. The one that you secure with a screw and push the tweeter into that plastic housing. Now in that case , as in mine, the tweeter will be recessed instead of flushed so I'm wondering if there will be any difference in sound or quality or what have you between recessed and flush?
Pics below. The first is my new set intalled and the 2nd is the other guy's. Notice how his will be flush and mine is recessed. There is another cover that goes over where my tweeter is mounted now and that will make it recessed. Also is the mach grill that fits over that other cover. Just wanting to know you guys thoughts on recessed vs flush

 

Its 100% personal preference, There is no performance difference as long as both have the same axis

 

cool,
thanks

 

I agree- there won't be any difference in the sound. I'd say flush mount looks better, but that's me.

 

yeah the mustang has the mach 460 grill and it looks cool. To flush mount it the grill would probably have to be left off. I
I already have it mounted in the location pretty much as the stocker was though