check my above post. Those other 3 plates are for the A1. Not A1 Mini. They will NOT fit the hotplate so do NOT buy them.
ALL bambulab plates are double-sided. Check your textured pei plate; it will have the same surface/label on the opposite side. The same applies with the Smooth Plate; it will be mirrored on the opposite side.
This means if one side of the plate is damage, you just flip it over.
A smooth and matte surface is the same thing; they’ve just flushed out the description with additional tagging. The textured pei plate adds a sparkle-like effect to the base. The Smooth plate doesn’t, which makes it look matte.