yes acrylic scratches easier than glass but it is also easier to remove scratches if you ever do get a scratch in glass good luck removing it
as far as weight, its not like you're lugging the tank around all the time, once you set it, it pretty much stays put, and if you do move it you need to break it down completly anyway.... not like you can move a full acrylic tank because its lighter
there is a difference in clarity but as long as you keep a glass tank clean and have good lighting its no "uglier" that acrylic
acrylic is more expensive than glass so imo that's my deciding factor
with this being an expensive hobby, save money where you can, and tanks are about the extent of it, with everything else you get what you pay for
just my opinion, welcome to the hobby