Dex, I think, is just referring to a HIT build which utilizes double attack, not the stats given. Imo the two builds are quite balanced, but definitely situational. DEX builds have double attack, which in itself is the biggest balancer between the two. Dex builds can also use the thana/ice pick effect while crit builds cannot and they are also able to exploit low-DEF players, while crit cannot. CRIT is a defense ignoring CONSTANT brute damage while hit build damage may fluctuate for better or worse.
usage of both depending on situation should be how it goes down. that is, if you can afford it.