As far as I know, the old system was A- spark B- approved spark, C -Technician.
To be honest, the system hasn't changed that much, it;s just the codings that confuse people.
So here goes.
Old system = 2360 part 1 now becomes 2330 level 2
2360 part 2 now becomes 2330 level 3
Under old system, 2360 part 1 had practical element, AM 1, now obsolete but can be taken as NVQ level 2 (I did this).
Under old and new system, 2360/2330 has practical element AM 2, revised, but still current and still a rigorous test!
so the underpinning knowledge element has changed coding, and perhaps style in the advent of an element of the multiple choice part. I stress here that there are extended question papers too.
That takes care of the A grade part, i.e. the minimum requirement for a 'sparks' card.
The old part 'B' is now the 2391 (actually been replaced in coding only) and with two years endorsement from a company will entitle the holder to apply for 'approved' status.
The part 'C' as far as I know is the design part, and this is where I will leave others to fill in here, or correct what I have asserted.
Please bear in mind, this is all (very hard to find) information, that I have pieced together from years in the trade and training. I hope it helps, and if I am wrong, then let's hope someone puts me straight because the college wouldn't give a straight answer!
Cheers.
Voltz