The difference between corporate clients and non-corporates (small businesses and individuals) is…

Irrelevant.

Yes, there are many differences in general between big clients and small ones. But those differences are insignificant compared to the differences between some big clients and other big clients. Or more importantly, between your ideal clients and people who aren't – whether they're in corporates or not.

Let me put it this way. Let's say you needed to hire a tall person. I'm sure there'll be some law against that, but let's just say you did.

And let's say that you had two candidates. A man and a woman. Who should you hire?

We know that generally, men are taller than women. So does that mean you should hire the man?

Of course not.

You hire the person who is actually taller. You ask them to stand up, or tell you their height or whatever.

But you go on the differences between the individuals, not on the differences between the huge and heterogeneous groups they belong to.

Whenever you're trying to plot the best way to market to your ideal clients, try to think of them specifically, and not just the big amorphous group they belong to (like corporates).

So don't ask “do corporates use Facebook?”. As “do my clients use Facebook?”. What you'll find is that some sectors within corporates are heavy users, others aren't. Some different types of functions are heavy users, some aren't. Some age groups are heavy users, some aren't, etc etc.

Same goes for any marketing question. The more you understand your ideal clients, the less you need to rely on gross generalisations which are probably completely inaccurate.