Have tried and used both and really they both do the job fine. 
Its worth running a tap through the thread of either just to ensure a smooth action on adjuster.
Real difference seems just to be cost
Left to right: what the original
should look like, what they normally look like, the aluminium adjuster, and the Carlami ones.
The aluminium ones are clearly CNC machined from a 3D model, and are excellent. The Carlami appear to be cast in a mould taken from an original, with a metal insert for the ball. Finish isn't brilliant but you can't see them when fitted. They appear to be robust which is the important thing. Having refurbished a batch of headlights late last year, the resin ones required a tap run through them to engage with the screw; the aluminium ones benefited from the same. Both are a big improvement over the thin hard plastic originals.
Ken said that he had bought the last of the aluminium ones, and they would no longer be available, hence the mix and match of both types.
Personally, If I had to do mine, I wouldn't spend twice as much just to get a prettier part.
Author
Topic: Headlight adjusters - which ones? (Read 1322 times)