Bolty,
The B1 will do a course which includes electrics. The B2 will do his avionics course. BUT, because the B1 course includes electrics it has effectively been removed from the B2 syllabus. Therefore for a B2 to get FULL cover on the relevant types he needs to do B1 and B2 courses. What will probably not be included is the detail of the engine more just the interface.
IAW,
Aussie LAMEs are recognised in Hong Kong, Singapore, Malaysia, Brunei, among others. There is a cross recognition problem for lots of national licences. And to top it all MOST western NAA's will not recognise the others. So.....EASA to FAA do the exams; CASA to EASA do the exams EASA to CASA exams, ad infinitum. If I wanted to work in Aus, the States, etc I would have to do exams in each case.