Comparison of the different GDPR articles

Answer:

I would first suggest to check the websites of the Supervisory Authorities of the jurisdictions you are interested in. For Guernsey and Jersey you could try starting with https://www.gov.gg/article/158844/Data-Protection-EU-General-Data-Protection-Regulation.
The ICO in the UK has a pretty good website where you will find all the necessary information https://ico.org.uk/for-organisations/guide-to-the-general-data-protection-regulation-gdpr/ .

If you are interested in a document that contains local adaptations of the EU GDPR you could consult the “GDPR National Legislation Survey” issued by Baker and McKenzie which is publicly available here https://globalitc.bakermckenzie.com/files/Uploads/Documents/Global%20ITC/DSC146096_GDPR%20Survey%20National%20Legislation%20Updated%2026%20May%202017%20(Belfast).pdf.

DLA Piper has also on their website a s ection with local data protection laws around the world as well which can be consulted here: https://www.dlapiperdataprotection.com/index.html?t=eu-section&c=AU.