Precision Cooker 4.0 vs A3.2 vs A2.2? What is the difference?

I’ve noticed that the Anova website states that the Precision Cooker 4.0 serves up to 12 people. However, the version I see on Amazon and In Best Buy says “Serves up to 10” people (on the physical box). Is the website wrong, or are these actually two different versions?