No, they're all the same. You can generally get sch40 pipe from a pluming supply house cheaper
Do not post misinformation. Pipe is not all created equal, The pipe used in plumping is far different than the pipe used in structural building ( yes i said structural, you think buildings are made from hrew/dom?).Towers are not built from hrew/rew/dom but from PIPE. There is even seamless pipe that is made the same way as "dom".
