And here is the official OPS1, no longer called EU OPS
http://eur-lex.europa.eu/LexUriServ/...01:0238:EN:PDF
Main difference is of course that OPS1 is law and cannot be changed by member states. Disadvantage is of course that it cannot be enforced by those JAA members that are not in the EEC. Member states can only adopt local regulations where it is shown that they are stricter then OPS1, good example is Subpart Q vs UK FTL. The UK FTL was deemed more restrictive and the UK FTL will remain in effect in the UK, at least UFN. Some of the larger UK AOC holders want the Subpart Q to take effect for obvious reasons.
Old Jar Ops was accepted by act of Parliament through the ANO.
In effect the CAA has no authority over areas covered by OPS 1, Brussels is now in charge.
Volumes can be written about the changes of ANO vs Jar Ops 1 and now OPS1, plus the advantages and disadvantage for operators, pilots, engineers etc.