legacycentral bbs

I'm not sure which one is better. One set has hydraulic lifters and one set has hydraulic lash adjusters.

http://forums.nasioc.com/forums/showthr ... ight=Ej20G
http://forums.nasioc.com/forums/showthr ... ight=Ej20G

Does anyone know what the differences with these heads as far as the valves and combustion chamber size would be? There are so many variations of the EJ20G it's hard to keep track of.

Go with the red valve cover ones! EASY to install, AND YOU WON'T LOSE ANY PARTSSSSSSS!!!!!! I have a set of the rocker arm ones that are worthless because I am misisng 1 part....

Fortunately I have a set of spare HLA already in the parts bin so that might not be a problem but with the set of Twin Turbo Legacy EJ20G heads it's a HUGE problem to find parts like cam caps, camshafts, valve cover gaskets etc.
Are the hydraulic lifters ones from some USDM Subaru?