HUD differences

Here are some stills of the HUD
http://s1164.photobucket.com/albums/q562/jmj944/?action=view&current=Picture3.png

http://s1164.photobucket.com/albums/q562/jmj944/?action=view&current=Picture2.png
If you notice the top right and left seem a bit different in both. What do you think these differences are?

Thruster on top left.

Three types of grenades. Looks like spike grenade is back.

Can’t believe I didn’t notice this before. Second picture. He’s holding 3 frags, confirming that at the time of the picture, you can carry at least 3 grenades, as opposed to 2 in Halo 3 (though Reach changed it back to 3).

The opposing team is green instead of blue, but it’s possible he’s just playing multi-team…or maybe Elite Slayer???

Gametype is called M/Slayer UR

Above the team names is a little icon with the number 3 beside it.

Also some obvious writing in the top left, but can’t read it.