Now I know!

At the outset - I must admit I'd far rather go downtown and shop - BUT - while we were under house arrest for over 12 months I lived off the infernalnet.  I discovered a source of rather fine pies.  Before I was finished Box 1 I indulged in box 2 for a change of flavour.  Problem - how to tell which from t'other once unboxed and freezered.  I had a feeling there'd be a method - BUT - they didn't condescend to enlighten me.
On a whim I've just bought a mixed Box, SO - purely by accident, NOW I'll know. which from t'Other.