區別是:old man統指上了年紀的人,older man指年齡相比而言年齡較大者,例如:
1、An older man came out with a little dog on a lead.一個年紀較大的男子牽着一條小狗走了出來。
2、The older man asked in his oily voice what he could do for them today.年長的那個男人聲音諂媚地詢問今天能為他們做些什麼。
3、She's having a relationship with an older man.她跟一個比她大的人有染。