Basically, it doesn't matter what your URLs are if all you want to do is embed a comparison set into your posts, the URLs won't really matter at all.
I went to your site and saw what you have. If I understand you correctly, you basically want to add comparison prices for each product you've posted about. Here's how you can do that: http://www.datafeedr.com/docs/item/167
That covers how to embed a custom view (in this case a comparison set) into your blog's post or page. Embedding store content into your blog is pretty easy.