High gloss acrylic with a marble finish or matte finish quarite acrylic are both acrylic. The pebble texture simply has a different "melt" temperature that creates the matte finish when being vacuume formed.
The water line is more apparent in "high gloss" acrylics than the matte finish and both will accumulate oils and minerals at the water line without good skimming action from the filter.
City water is different than well water which will have more mineral matter such as calcium, lime, copper, iron etc. that can or will etch or adhere to either acrylic surface.