Differences between Player and Holoduke
A player actor and a Holoduke seems to share several attributes. Care must be taken while using events related to an actor APLAYER.
A player and a hologram have the same picnum, statnum, yvel, etc. This is most likely proposital in order to avoid an enemy tell the differences.
One difference that seems to be constant is the owner. A hologram always will return an value of -1. A player will return a specific value, or a value of zero during EVENT_EGS.