I am intending to take an NLP practitioner and then masther practitioner course. Now thinking about which instructor is better, any suggestion?

Richard Bandler and John Grinder co-developed NLP. Which one is better in teaching NLP? On the other hand, I wonder if their students, Robert Dilts and Tad James, are better in teaching NLP now as they have taught for a long time as well.
If so, then is Tad or Robert better and why?