Why have them back to back? Is it ego?
How could it be anything but? (which is silly given the relative size if you compare them).
I'm sure they will both say that their auctions are planned out far in advance, but we already know HA has a Spring, Summer, and Thanksgiving Signature every year, and looking at the Emovie Calendar they will have their December Major open the week after the HA auction closes.
If anything, they should try to get out in front of the HA auctions, instead of following the rear, but that will probably take you harping on him endlessly before he listens.
Kind of like when I used to say that Emovie should do previews of their major auctions, because if they were that big you want to let people know what is coming so they can save up instead of just giving them a week to get everything in order. Bruce finally listened to that one and now their previews are a regular (and good) thing.