Co-axial means the tweeter is mounted in the middle of the speaker so you need one 6x9 hole. Component means the tweeter is separate so will it's own mounting. So for most people the convenience of the co-axial far outways any benifits of the component when it comes to the Mini rear speakers.
Some people are like a Slinky ........ not really good for anything, but you still can't help
but smile when you shove them down the stairs
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