It's very possible that they are controlled by the same person. But, I would do a little more investigating to ensure you're right before taking action.
If you're unaware, steemdb.com is a great site to explore past transactions on the block chain.
In fact, if you ever just go to the top of the address bar and change the "it" in steemit to "db" for database, it will take you to a page that will give you a lot of information on that blog/post/comment.