A superfund has a tax rate of 15% in the accumulation phase and...

A superfund has a tax rate of 15% in the accumulation phase and you can put in money using salary sacrifice which saves even more tax. So this is, without doubt, the best tax vehicle. All withdrawals are tax free. Downside is you can not get the money until you are 60 years.

Don't know about trusts, but a company pays tax of 30% which you get back as franking when you pay dividends. A company gives you the ability to control when you distribute profits. You may also be able to stream dividends to you and a partner as desired, using different classes of shares (I say may, as not sure how this works for tax).

You can transfer the shares to the superfund/company but this triggers a sale for tax purposes.