All I know is that I relied on the hechsherim which other decent frum people I knew relied on. I don’t have time to involve myself in the detailed intricacies of each and every kashrus agency, knowing each of their exact standards. Generally however I’m quite sure the hechsherim I mentioned above are *at least* as good as OU or LBD. For me, that’s enough.
I on the other hand find the Americans to be extremely confusing. The only ones I know are the OU (which is M-O and I know it’s ok for parve things in any case) and the CRC (Satmar) which I rely on for anything. About all the triple/triangle/square/round/inverted-Ks, I haven’t got a clue.