beg to differ (with someone)
Fig. to disagree with someone; to state one's disagreement with someone in a polite way. (Usually used in a statement made to the person being disagreed with.) I beg to differ with you, but you have stated everything exactly backwards. If I may beg to differ, you have not expressed my position as well as you seem to think.
differ from something
[for something] to be different from something else. No, this one differs from the one you saw because it has a bigger handle. How does this one differ from that one?
differ in something
[for people or things] to be different in a specific way or in specific ways. They differ only in the color of their eyes and the size of their shoes. They differ in size and shape.
differ (with someone) about something
and differ (with someone) on something 1. [for someone] to disagree with someone about something. I must differ with you about that. We differ about that. I don't differ with you on that point.
2. [for someone] to argue with someone about something. Tom was differing with Terry rather loudly about which one of them was going to carry the flag. Let's stop differing with each other on these simple things!
Tastes differ.
Prov. Different people like different things. Fred: Bill always goes out with such stupid girls. I can't understand why. Alan: Tastes differ.