Last Thursday (06/12/2017), I
passed the GCIH exam. It's my first security cert and I am very happy!

I want to be a good pen tester and wanted some advise on which course to take up next.
Should I take SANS 560 or jump to SANS 660?
The below link suggests, the SANS 560 has more deeper training than 504 although I thought both are similar.
Any thoughts or advise from personal experience? I am just 6 months into info sec.
https://pen-testing.sans.org/vsfaq"I've Already Taken SEC504. Should I Take SEC560 as a Follow-on?
560 was designed as a perfect follow-on for people who have already taken 504 and are looking to get into more depth with tools used in professional penetration testing and ethical hacking. 560 is not recycled 504 material; it is an entirely new class with an entirely new set of slides and exercises."