5227 got the wrong movement?

[Silver Bullet]

As the "flagship" Calatrava, and Thierry Stern's personally designed Calatrava, don't you think that the 5227 should have gotten the cal 240 movement rather than the 324? Wouldn't that help to justify the cost beyond the hinged dustcover? (Not to suggest that the invisible officer's caseback isn't great, but definitely to suggest that it may not be worth the cost of the 5227 over, say, a 5296)