We appreciate your interest in our products and we would be glad to assist you with this.
Our Matte finish would be easier to clean once it gets dirty or a stain passes the surface, the Glossy finish would be easier to maintain clean initially however it is harder to clean once the stain passes the surface.
A matte finish would be less slippery when compared to the glossy finish especially if, in the shower, we would not suggest having this as a shower bench as it is mostly used to hold shoes, magazines, towels or other shower items as such.
ADM Bathroom Inc