That's quite right. What you really want to look at is the syllabus that is taught by these outfits. Assuming the students are all about the same level in terms of handling, the techniques (IFR particularly) that the CTC Cadets and NZ Cadets are equipped with are very solid. Instrument flying at CTC is taught well.
Other schools - Bay Flight and Ardmore spring to mind - are churning out a bit of a rough product, irrespective of the student's particular abilities. If you take a few 250hr Kiwis, the ones who have been through CTC would handle the rigors of RHS turboprop flying better than any others.
CTC would also be one of the few schools in NZ to offer a legitimate step-up course in their airline preparation course. NZ students are expected to complete that as part of their training as well.
I would not reccommend that any NZers with UK or EU work rights apply for the UK Wings course - there is a serious amount of misinformation around at the moment. The so called pilot shortage in the UK has seen a few of their cadets who have finished their training sitting around for 6 months working in bars and racking up interest on 70,000 pounds.