I have one of each and they both have their strong points. Acrylic scratches buff out easily with a power buffer. One of the main downsides is you shouldn't put plecos in acrylic tanks they will rasp it badly over time causing a hazy look. Some plecos are worse than others but probably all will eventually scratch it up. I have sand in the bottom of my acrylic tank and I'm going to switch the whole tank to a different setup soon because the sand really makes it hard to clean around the bottom. All and all I prefer the acrylic because it's so bright and clear. My 75 glass tank is a nice newer tank but definitely has a greenish hue to it. The nicer tanks with star fire glass are as much money as acrylic tanks and glass absolutely does scratch too, just not as easily.