I prefer bar clamps over pipe clamps, but pipe clamps are less expensive.
I use bar or pipe clamps when I’m gluing and joining larger wood that requires more capacity and more clamping force.  This could be a table top, or any other large surface over about 24″. I prefer bar clamps over pipe clamps, but pipe clamps are less expensive.  Just know that the pipe clamps for sale are just the jaws and don’t come with the pipe.  You’ll need a section of pipe (available at the home center) to mount the jaws on.