Related thread:<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=8362040" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=8362040</a><p>The difference appears to be that you can resize concurrently with lookups.  From reading this article it seems they are not that happy with this aspect of the implementation:<p><i>Right now, if a get call encounters a Redirect, it helps complete the migration. Perhaps it would be better for scalability if it immediately read from the new table instead. That’s something worth investigating.</i>