Many words have optional spellings: several versions are correct. Which one will you use?
Online or on-line? web or Web? realise or realize?
In such cases, consistency rules. Your personal preference is irrelevant.
Somewhere in your (client's) organisation is an inhouse Style Guide. It's a publication that nobody reads except the people in Corporate Communications. Most likely you'll find a copy there, although someone did give you one when you were first engaged.
Listed there (or should be) are the definitive spellings you must use. Otherwise chaos rules as everyone makes it up as they go along.
What's wrong with chaos? Well, it unsettles your readers, and tortures you, the writer, with numerous fiddly little choices.
Oh dear, what if you can't find a Style Guide and nobody seems to care anyway? Use the dictionary approved by Corporate Communications... and in extremis, use your own dictionary.