the projector one i aussme you would use them with HID kits ... the last one i have had them on my 180.. and yes better improvement ...
the projector ones will depend on the quality of the project itself . like comparing projector lights off a s13 to say a s2000 (they are said to be one of the best projector system to come stock ) .... but then agian if you are a DIY man you could and i have seen a link and guy modify the head lights of his 180sx to take the s200 projector lights.. so if you were to do it, i would get the projector one you have there and convert it with another projector system.. doesnt look to hard .
cheap ebay crystal head light (second example you have there) will have a improvement and will work but in time the heat off the globes will dull the backing plate ( shiny bit) (i had ebay ones ) .. i belive the RAYBRIG ones are the ones you want.. awesome quality and agian the next level for light output ( my cousin had them on his 180 from japan lucky bastard and the light out put was alot better compared to mine) .. tho they are not cheap 250 from memory.. .
hope that helps./
