They are not the same. With Google Reader you had a virtually infinity history of the feed while with feed clients you only receive articles from the current and past feed files seen. An article about this topic: <a href="http:&#x2F;&#x2F;blog.databigbang.com&#x2F;tag&#x2F;google-reader&#x2F;" rel="nofollow">http:&#x2F;&#x2F;blog.databigbang.com&#x2F;tag&#x2F;google-reader&#x2F;</a>