I personally love the bamboo insole more, but they're both sturdy and comfortable. I've written a more comprehensive review on the bamboo slippers -- http://www.amazon.com/gp/product/B007IPRJ2C/ref=oh_details_o02_s00_i01?ie=UTF8&psc=1 -- they're both made by the same company.

I think it's really a matter of whether you want something really sturdy and fresh -- bamboo -- or if you want something more cushioned, warm, but also sturdy -- this style.