come to sb与occur to sb的区别?

根据牛津高级英语学习词典,楼主问的肯定是两者意思一样的区别.两者都有“突然想到”的意思.
1）come to somebody[no passive] (of an idea) to enter your mind
The idea came to me in the bath.
It suddenly came to her that she had been wrong all along.
2）occur to somebody(of an idea or a thought)
to come into your mind
The idea occurred to him in a dream.
It didn't occur to him that his wife was having an affair.
It didn't occur to her to ask for help.
3）异同点
a:come to sb 和 occur to sb在想到一个主意的时候,是可以互换的.
b:两者均可以接that从句
c:occur to sb后面可以接动词不定式.但come to sb后面不可以接.