Of the two you mention Corsair is the better option. What is the actual price they're going for? It would be rare to find them the same price. When I checked I saw Corsair @ $130 (wayyy too high IMO) and OCZ SXS 700 @ $90 or $65 with rebate.
There maybe better options out there.
Unfortunately ocz isn't available in our country,he is getting ocz by an international reseller in $105 and corsair(available locally) for $131.
So we are thinking that ocz isn't a bad deal for 700w at 105$.also there will be no psu available at this price point except ocz.also ocz has got nice reviews.
what to choose between,we can't decide.