Hey all, I'm new to this forum but I wanted to comment on this topic. I am from Europe. Grew up in South America and Europe, and I live now in the US.
My background is Knock-Down Karate, Muay Thai, and BJJ before I got into Krav.
It is very hard to compare systems belt for belt, some systems will focus on some aspects of the curriculum before others. As long as it all gets covered in the end it's all good.
Furthermore; Just because a system or a group are the original practitioners of the system does not mean they are the best.Look at the Dutch Thai Boxers (Even fighters from Thailand travel to Holland now to train with the Dutch Fighters)or take Brazilian Jujitsu VS Japanese Jujitsu. Some styles that are good in themselves can evolve to something even better when used by groups that bring in new ideas that the founders of the system did not include in the original form.