用英文对比，急，在线等

Gentleman is general word for all mankind, it has been used in formal event. It is a more polite way to say "man".

Educated man is a word to describe someone who is well educated or have been in good university. however, we dont use this word as a title.

共同点：都是对举止优雅行为得体受过良好教育的男士的表达。

不同点：gentleman 更加口语些，说的比较普遍，比如说会议的开场白一般都用“Good morning，ladies and gentleman” 而没有说“Good morning，ladies and educated man"的，着重为了表达对对方的行为举止好感和尊敬，日常用语。
而educated man相比起gentleman来说，更加着重强调因为受教育而拥有的内涵，比如说博学之类的。而且这个词日常不怎么用，除非特殊场合或原因。

GENTLEMAN:
n. 绅士,先生
EDUCATED MAN:
有教养的人