6" vs 5" ROS: Why so much more $

I've been looking into a new ROS and I've noticed that the 6" machines are much, much more than the 5". The cheapest 6" is double the price of the most expensive 5".
To anyone who owns both. Is there a real advantage to the 6" machines?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.