Gloss: OS>OCW (but OCW looks nice too)
Slickness: OCW> OS
Ease of application: OS>OCW by the slimmest of margins, although OCW is definitely a bit more finnicky in certain weather conditions.
Huge huge fan of optiseal and the spray wax. I think the optiseal gives a great shine and the ocw just amps it up a notch. I also give two layers of os followed by ocw.