Hi,
Welcome to the world of microlighting!
The syllabus is a little more straightforward and has some differences.
To give a vivid example, most microlight students use Brian Cosgove's Microlight Pilot's Handbook as their text - just one volume!
As a microlight ground examiner, I will try not to give too much away, but:
Microloight Air Law is very very different from light aircraft law. Mainly now to do with "on the ground stuff", ie licence validity, permits to fly and general airworthiness, maintenance etc.
"In the air" stuff, like flights over built-up areas etc has now basically been brought into line with light aircraft stuff. Other things, like right of way, 500ft rule and keeping to the right when following line features, conforming to established circuit patterns etc are obviously the same, or there would be chaos (more chaos?) in the air.
Microlight Aircraft General, ie principles of flight etc is slightly different in that you need to know a little about weightshift microlights (a control system that is not in the GA world) since there is just the one exam paper for all microlights.
Anyway, your instructor should be able to talk over all this sort of stuff! Enjoy!