yes it would ,
Along comes a google bot
whats this ohhh a article ...
This is an article about .....
the google bot says ill index this sucker in to my database so when people search google this will come up ...
a week later a google bot is on your blog site
it says whats this ohhh a blog ..
This is an article about .....
What the hell this is the same thing
Then its either not going to index it , index it and remove the other one or just black list you
if the content is different thats fine ...thats how the internet works different content different url's BUT if you have the same content on
www.yoursite1.com/blogs
and
www.yoursite2.com/blog
even tho that's not the intent if the same content can be reached with 2 different url's then your screwing yourself