The original Multi-sort sorting tray was designed for common 3D printer parts - M3 and M4 nuts and bolts and other small items. 

The Multi-sort V2 is designed for more variable sized objects like Lego. It has larger side chutes and variable sized guide channels. The narrower guide channels for smaller pieces are closer to the front of the sorting section where the smaller pieces will tend to congregate through numerous sortings.

The V2 version also has some other QOL improvements. The central barrier is higher and has a steeper internal angle to prevent larger or slippery items escaping while emptying the chutes. 

Video of the original Multi-sort tray showing how it works.