899,sei,sei abarth,sei mk2/mk2 abarth/shumi.
there all the same except they come with plastic attachments underneath. 899's have a eye lid type thing. and the shumi/mk2's have a mesh.
and yes the adjuster is different i think some early 899's are manual ????? but its the same fitment for your motor i tihnk.
ive got 899 lights in my sporting and they were exactly the same. also got a mk2 abarth in on the other side just took the plastic off the bottom of them both.
(handy hint, 899 lights are cheaper brand new :S:S)