This query on competitive lower price almost always invites the "apples for apples" cliche, which, interestingly, has now found its way into the negotiation language of more buyers than sellers.
That, in itself, is a good enough reason to drop it from our own language, unless, of course we ply our trade at a fruit stand.
"Apples for apples" is like a sweet skunk. There ain't no such thing; at least in the world of competitive selling.
Every person or company has a unique selling proposition (USP). The products might be identical in shape, size, taste, smell, color, and availability. But the competition hasn't got you to offer the customer. So all things are never equal. The field of battle is always in the mind of the customer. That is where you will win or lose the sale.