どちらもperson人やthing物にfocal point焦点をat or in the very same...当てますが、angle角度がdifferent異なります。pertaining to关于 はトピック/theme主题("about, on the subject of")をto introduce into導入します。regarding对于 はmanner態度やoperation行動のJapanese variant of 对対elephant象("towards, with regard to")をto introduce into導入し、regular通常、idea意見やconclusion結論が付随します。
about关于this这个question问题everyone,大家has有what什么views看法?
On this question, what are everyone's thoughts?
with对于our我们的work工作the boss,老板very很satisfied满意。
The boss is very satisfied with our work.
Remember: pertaining to关于 = the TOPIC ("about X"); regarding对于 = the TARGET of a feeling/action ("towards X). If a view or reaction is attached (satisfied with, strict about), it's regarding对于; if you're just naming the subject, it's pertaining to关于.
Watch out
- Where only a topic is meant, the two overlap (pertaining to关于/regarding对于 this这个question问题…) — the split bites when an attitude is involved.