Get your facts right buddy before posting shit on the forum.
R34 GTT 14.2 1/4 mile
S15 Jap Spec 14.2 1/4 mile
they run even, however they always say S15s will keep up to a r34 GTT technically meaning R34 still outperforms it. That is the JAP SPEC S15. Australian delivered S15s (99.8% of them here) are nothing compared to a GTT in performance.
I have a R34 GTT and R32 GTR, even tho the GTR is a complete animal, I would preffer the 34 anyday as its a pure joy to cruise in and gets attention left right and center even in stock form. To achieve that in a S15, you will need fair bit of mods on it so people will look twice.