I do not know who found the special start thing. I believe it was JezusSaurusRex. But I think I have experienced both of them. In one, I spawned with limited HUD and the eclipse was not there. In the other one, I started and had no "
low ammo,
no ammo, and
X reload HUD. I'm not sure but I don't think they actually have any significance, maybe the way you activated an easter egg in your previous match.
**EDIT** (Better description).
In one, I spawned with limited HUD and the eclipse was not there, the moon was gone and my ammo/points counters were gone. The player list by hitting "BACK" on the Xbox controller was also not showing. On top of that the Round number sign was black. In the other one, I started and had no "
low ammo,
no ammo, and
X reload" HUD. Meaning when I had low ammo, it didn't warn me with the yellow text and when I had no ammo the red text didn't show. If I needed to reload, there was no
X reload heads-up.