Why all the vertical models with 300-350-370 mm blade have 2 available plates?

Why all the vertical models with 300-350-370 mm blade have 2 available plates?

The TC plate (TC is for Taglia Carne = Meat Slicing) is optimized for the cut of fresh meat: it is mainly used in butchery stores or departments.

The BV plate (BV is for Braccio Verticale = Vertical Arm) is mainly designed to slice deli and cheese: it is used in delicatessen stores or departments.

The TC and BV plates assembled on Manconi Slicers with diameters 350-370 mm (both Kolossal and Smarty) can be switched.