If you intend to be only one or the other I would suggest the corner clamp because it will serve a larger number of applications. I bought the right angle clamp, it does work well but if you are trying to build a cabinet (as I was) the design forces you to have the pocket holes exposed to the outside - it's the only way the pin can fit into the hole. You may be able to work around this by planning better than I did but with the corner clamp you wouldn't have to think about it.