one big angular component vs several smaller ones

I have an html view that has a left region and a right region. the left region has two sub-regions. I can handle this with one angular component or, make a component for each of the four regions that I described.

When/how do I make the decision of one vs many? Especially given the fact that in this use-case none of the sub-regions will need to be used elsewhere in another view. Does it make sense to break out into several components just to keep each component simple?