You are absolutely correct.
The key differences that I was pointing out were:
1.) Ability to apply for the officer track online against specific routes (Analysts, Clandestine Service, Tech/R&D, etc.)
2.) Ability for dual nationals to apply for the officer track (yes, MI6 has some conditions here --- but, in the end, if you satisfy them and have been living in the UK for 5-10 years, then you can apply; the CIA seems to be more open --- any dual national can apply to be an officer)
3.) The intel academies there are much longer than the ISI course.
4.) The intake/testing is based on aptitude, not memorization of random Pak Studies facts and other obscure knowledge. It is much more modern and focuses on critical thinking, problem-solving, lateral thinking and overall cognitive/intellectual ability --- not knowledge retention.
I think we have suffered as much from Pakistani nationals (no dual nationality) as we have from any dual nationals. The key is to separate the ones who just inherited or got a foreign nationality for ease of intl travel through an investment scheme, etc., VS those who seem to have some real ties to the foreign country. This, of course, requires a much, much, much better clearance procedure --- the current one is pretty trash.