CITT rulings often make very little sense to people even involved in them.
The rulings normally come down to satisfy a lobby group with a vested interest. A high-volume, mass merchant like C-Tire or their supplier Crossman would have that interest in keeping what they sell legal and importable without special processing fees.
Even if the first product with an OK is identical to Person #2's which is disputed. Person #2 will be crushed like an ant by the ruling and the big guys who pay the taxes in a critical riding will skate along. The unfunny thing is they'll often rule the opposite and lump items together as "like goods" even when they aren't if that ruling will better suit the way the wind blows.