If you want to use it in a solderless breadboard, without having to solder it to a carrier board, you should choose the DIP (Dual Inline Package) chip.
The SN75176 is no doubt sourced by several manufacturers as its the de-facto common RS485 driver,
they should all work the same (unless running at exotic temperatures in which case the exact version
can matter).
Make sure to get the right package of course.