badlydrawnscoob

hi there,
this one is for a ecu expert.....or someone who has got an early sti.
ive just bought a v1 sti with the 250ps ecu.
what i want to know is.......is it good at coping with just optimax with no booster or should i change it for a Z4 ecu (which has 260ps and ive been told is great for dealing with optimax without using octane booster)
i would assume it will make it a little faster or maybe a bit more responsive.........i dont really want the sti ecu in it if ive got to use octane booster (and i dont want to be worrying about det too much.
any info would be great.......thanks in advance.