xr6 and xr6 hp any diiference??

[JKelman]

gday guys been lookn round for an au engine to go into an e seiries.... im after an xr6 and ive come across xr6hp is there a difference in the two or wat?? is the hp unique only to xr6 engines or standard au engines aswell and what does it mean.

i am very confused haha. any info and recomendations of which engine i should get from the au crew would be much apprciated.
p.s. not interested in the vct engine as they are way to hard to convert to an eseries.
cheers