I can see a few differences.

Pushing Keepass vault to cloud storage:

* No per-item synchronisation

* Full control over encryption of the database

* Choice of cloud storage to trust with vault

* Free as in beer if no using cloud (or using a free/already paid for offering)

1Password:

* Per-item sync and collaboration

* Full trust on the (closed-source) client apps over encryption of vault

* No choice of cloud

* No choice of encryption

* Mandatory paying subscription