The signature looks off to me. The problem with the hologram, even if real, is that they can be easily removed from a legit ball and added to a fake.
I am not comfortable with this signature. In my opinion, it is consistent with the style that has been questioned by many educated collectors. Regarding the hologram... no one seems to have definitive answers. Stolen holograms, swapped holograms... counterfeited? Who knows?
In my mind it's a moot point given the signature.
It doesn’t match the examples I’m comfortable with,
Here is one to compare it to. It was purchased from Steiner Sports. Notice that mine was signed with a felt tip pen, and not with a ballpoint pen.
As others have said, the hologram means nothing. There are authentic examples with the hologram and terrible forgeries. Like this one. My lawyer paid $350 for this garbage at a charity auction.