Watching the ensemble black comedy “The Estate,” written and directed by Dean Craig and co-starring Toni Collette, will no doubt draw comparison to another ensemble black comedy co-starring Toni Collette, “Knives Out,” which dwells in the same story milieu of money-hungry family members competing for a mention in a wealthy family member’s will. Of course, “Knives Out” is a twisty whodunit in the vein of Agatha Christie, and Craig’s film is merely an exploration of what depravities people might sink to in hopes of getting a bigger piece of the financial pie. Still, there are enough similarities between the two films, both rife with smarmy, unlikable characters, that one could become preoccupied in wondering why “Knives Out” works and why “The Estate” decidedly does not.