I'm thinking during maintenance time at my website instead of showing "Maintenance Page" redirect to the same idea site. It takes some time up to 1 hour
And I'm thinking to use temporary redirect.
What is the negative side of doing that?
Regardless of SEO, I suspect that would be confusing to users. If they are expecting to see one website and then see another without an explanation what would they think? Wouldn't an explanatory message that the site is down for maintenance with a link to the other site be not only more transparent for users, but good for search engines as well?