Aeronautical engineering is more towards the study of designing and/or manufacturing aircraft. For instance, if you're an aeronautical engineering degree holder, you may work for aircraft manufactures such as Airbus or Boeing etc. where you will be developing new aircraft designs or improving the ones that are already there.

Whereas in aircraft maintenance, it is where a group of people in a company (usually airlines) that will be responsible in maintaining the well-being of the aircraft that the company possesses i.e. change engine/lubrication oil, check tyre pressure etc. (a close example would be like the mechanics in a car service center). But unlike those car mechanics, aircraft maintenance personnel must have the appropriate approval or license in order to work on an aircraft. And these aircraft maintenance people will fix any problems on the aircraft with respect to the specifications and instructions drawn up by the aircraft’s manufacturer.

Aviation is a big field. I tried to dissect the difference between aeronautic and maintenance the best I could. I hope this helps a bit if not much. =)

Others who know better, feel free to add or comment.

I'm from AATC (advance aeronautic training centre)

From my expriance...DON'T GO THERE.. It's a waste of time and money.

I studied there for about 1 year and a half..and stop study there now.

AATC is NOT APPROVED CAA!!!! but the Executive Jet is..
The disciplined there is worst then the kindergarten .. student who dont come to class about a month still can sit for the exam as long he paid the fees..? weird huh. I know that almost all airliners don't take student from AATC. (don't ask me why)
Some of the student there can hardly speak English... you know...you can studied there if you have 5 pass in your SPM so easy..
That place is for loser only... but there a few good student... they don't have a choice cause there have taken loan for the school and studied for more than a year and just know that the school has been screwed with them all along.

Now I'm going to study in UK next month..

Recommend City of Bristol College.. this college is one of the training school that is approved by the DCA plus they has alot of malaysian studying there. .

You can get more info at this site CITYOFBRISTOL.AC.UK

Cat A is used for Licensed Technicians. They have limited certifying priviledges.
Cat Bs are for Licensed Engineers. B1 being Mechanical, B2 being Avionics.
There is no requirement to hold a Diploma in Aircraft Maintenance if you want to be a Licensed Maintenance Engineer. As I mentioned earlier, you MUST have a license issued by our DCA (Department of Civil Aviation).
Nilai College is just an academic college. Thats about it.

India? Study what?

Not quite.
You can still get the 'LWTR' if you're a school dropout(for whatever reasons) but most job appointments will be based on minimum SPM qualifications...

Nilaai again ? 

im planning to join Nilai uni college for the AME course. I want to know if their lecturers are good? I am also looking at Air Transport Training College in Singapore about their AME course for easa part 66.. need opinion on Nilai uni college from students there