Alumo 120 vs. 100 - Differences?

[fatpauljackson]

I bought a few shirts from Ascot Chang in Alumo 120 which to me are super nice - fabric is extremely comfortable. Just wanted to see if people who’ve owned the 100 vs. the 120 have comments along a few different dimensions: fabric quality, effective feel (e.g., is it that noticeable), and most of all durability (how many washes, how long do they last, etc.).

Basically wondering if I should just keep buying 120 as my basic mainline shirt, or if 100 is significantly better from a price / performance ratio perspective. Thanks.