said 1 year, 4 months ago:
I would have to advise you against pushing out the same article to be published on both blogs, for several reasons:
Seo: Google does not like duplicate content and it will end up hurting your rankings.
Audience: If you get new followers, they will be happy to follow you on both sites, and will be disappointed and possibly even turned off to see that you’re creating the same content for both sites.
Plus Im sure that the creators of this new blog will not be too enthusiastic to know they would not be receiving original, fresh content. Most blogs who accept guest posts have a strict policy about that in their rules and guidelines.
Unless this other site is a content sharing site (i.e. StumbleUpon, Digg, etc), then duplicate content is never your best bet.
Congrats on this new opportunity though