They're the same one.
Stay with 'Ogon'' because this was the name originaly given to this conifer...

Isn't there actually another name now also?

I like Ogon as well.

Another one is 'Golden Ogi', but you can forget this name as well...

Golden Ogi, my lord. Someone's kid was given a job in the cultivar naming department. Metasequoia "yellow thin" would be better lol.