Big Sean isn't that great of a lyricist but at least he's trying and he actually makes good music. Tyga on the other hand is a subpar lyricist and alot of songs have 0 substance, they are for strip clubs and night clubs.
Lil B actually has some bars. Tyga does too, I haven't really heard anything from Big Sean that I thought was great. Clique is a good song but it's really the chorus.