PVC pipes are less expensive and easier to repair. Metal pipes are more expensive and more difficult to repair.
Different plastics, most are proving better than metal.
Metal free weight tend to be heavier than plastic ones. It is always recommended to get real weights over plastic ones.
no they are not
Wooden folding tables are more sturdy, they do not have the tendency to bend like metal tables. You can move the wooden tables easier than the metal ones and you do not have to worry about rusting.
Wooden are sturdier and don't rust.
No, not unless they are welded together where as wooden ones are glued. Metal ones are better for hanging pictures
Because most of the strength of a cylindrical piece is in the outer layer, so by using pipes you get a better strength-to-weight ratio than by using solid bars.
you can get them with a chrome finish.
No. A silver metal is better than a bronze metal.
Copper was good, mainly because it doesn't rust. Now there many pipes in plastics such as PEX, which are infinitely better than copper. Nobody smart uses copper any more.
Aside from cost, which is lower, there are several reasons that PCV piping is better than the conventional metal pipe. PCV is a strong resiliant material that can be molded into any pipe shape. It does not corrode, so you do not have to worry about rusting or rotting. The piping is cost effective and has been shown to be leak resistant, saving in repair costs as well.
Metal chairs are more advantageous than wooden ones, because metal chairs tend to be sturdier and thus need to be replaced less frequently. As well, they can have a sleek appearance that would fit better with modern decor.