I had the story reversed... He had two or three guitars. He loved one neck, but couldn't bond with the body which had a hard-tail. He had another body which he loved the sound of, so he swapped the necks. Sorry for that, I apologize...
That said, if I put a pine shim to block your guitar, and told you it was alder, you wouldn't hear a difference, guaranteed. Some pine can be harder than some alder.
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