'core advantage' is correct and can be used in written English.
It is usually used to refer to an advantage that is essential to the success of a plan or strategy. For example, "The core advantage of our plan was that it saved time and money."
This may be because recipients know what they need better than donors do—a core advantage of no-strings schemes.
A sentence I wrote earlier this month has provoked much criticism: "I still believe the greatest strength of America, its core advantage over the old world, is its lack of interest in where you're from and consuming interest in what you can do".
One thing appears clear for both political parties as the next presidential election looms – an election in which candidates on both sides will be running without the advantage of incumbency and facing extended primary battles: the general election candidate with better access to microtargeting and other quantitative research on the day he or she grasps the nomination will have a core advantage.
2) Relative advantage embodies the core advantage and competitiveness of online financial products.
I believe this is indeed the core advantage of the deal in terms of being able to compete with the dominant rival to both companies, Google.
The core advantage of the system is that it does not employ the real pupil-center as a reference point for gaze estimation which is more reliable against corneal reflection.
In that sense, one the core advantages of L.B.O.
In fact, one of Netflix's core advantages over competitors is its ability to stream on nearly every connected device.
One thing building on the last, anticipating the next, maintaining and extending core advantages while opening up newer ones.
Liautaud pointed to Citymapper's execution on mobile, its "pure focus" on public transit navigation and its localization to each city as core advantages over rival transport apps.
One of Pinterest's core advantages is tapping into a moment of inspiration for a user, in which they end up diving deeper into a rabbit hole and finding a topic that they are interested in but initially just weren't aware of.
