Should I redirect this?

[djbw]

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The majority of traffic to my blog is to one post in particular, so I've set up a microsite about that topic with completely new content (not completely finished yet though).
Should I set up a permanent redirect from the original page to the new site or concentrate on SEO and backlinks for the new website and keep both running concurrently? I have added a link to the new site from the old page, to encourage people to take a look.

[IntroSites]

id keep them both, 2 positions better than one

[aero_mansoor]

two heads are better then one keep them both!

[djbw]

Thanks both. It appears to have been worthwhile leaving both running concurrently as the single click I've had on the new website resulted in a sale!