We need much more info to help you with this. Inserts are just that. They were a stand-alone set released in packages of a larger set. A variation is a different version of a base set card but not a parallel version. Also, parallel sets can have a variation card. So I'd need to know exactly what card you are talking about to give you an exact reason why it is an insert instead of a base variation.
NO PWE's EVER!!! PLZ PM me 1st before sending any offer. ONLY selling cards as of March 2024. No trades or purchases right now.
_______________________________________________________________________
Largest total PC card collections by Team, then Athlete (as of 3/22/24):
STL Cardinals (MLB) - 8810; Carolina Panthers - 2888; GB Packers - 1790+ cards
Mark Martin (NASCAR) - 2038 cards; Jimmie Johnson (NASCAR) - 1875 cards; Jeff Gordon (NASCAR) - 1594; Ricky Rudd (NASCAR) - 839; Ozzie Smith (MLB) - 707