Hi everyone. I'm wondering what the differences are between Kuiu's 230 merino zip T and Firstlite's Chama QZ merino shirt? I understand the Kuiu is a poly/merino blend and the Firstlite is 100% merino. But what are the pros and cons of each? Which would make a better second layer over a lightweight merino base? Which is your favorite and why? Thanks for any help.