I really think this falls under my opinion of most titles in software. There's so much variation with little differentiation or standardization. Is it entry-level or junior, midlevel or intermediate? What defines a senior dev/engineer? You may have people that have the title of developer who do more "engineering" (however you want to define it) than someone with the engineer title at another company. Just the way someone might be a senior dev at one company but not be considered a senior dev at another.

Don't get me started on companies calling themselves Agile, etc...