It does have more features; they're banking on the fact that users who try out Gitlab will like those additional features, and thus will want to pay for the ent

It does have more features; they're banking on the fact that users who try out Gitlab will like those additional features, and thus will want to pay for the enterprise edition when their business decides to self-host. Though I will say that this can be a sneaky business model. Users might not realize some of the features they depend on in the gitlab.com version isn't from the community edition.