Brown-type switches are OK, it's the blue-type keys that are problematic.
People in the office are still using old-school typewriters for certain official documents, so I expect I can get away with it. If I can't concentrate due to existing office noise, I may as well have some fun. Thanks!
Still I like the newer quietened version, so I'm considering buying some more for my home keyboard (it is an identical model).
I'd recommend to get used blue and try it out.
I use green switches with o-rings in a semi-open office layout and the only people who have ever noticed it are other mech enthusiasts. Browns with o-rings would be even quieter than greens.