It's not about which one's better. Both Greddy so they're both quality exhausts. The only difference really is the style of the muffler. Both have the same size diameter piping are both straight-through.
go with the Ti-c, personally sounds more badass and smoother, not so ricey at end gears, evo2 gets a little to loud but still sounds badass, but you might find yourself getting pulled over quite often, depending where you live of course. Ti-c ftw!