Which Gate Is Harder?

I was wondering what gate is harder to use for which type of charecter. i.e. is it easier to use a charge charecter with a octo gate, then it is to use a shoryuken charecter with a square gate?

I use seth with a square gate but im getting used to it, i could switch now, but that would be a pain, i may if octo is better all around. what do you guys think?