Apple wired earphones with 3.5mm pin - Magnet's polarity

I've got two pairs of original Apple wired earphones with 3.5mm jack, with L1, R1 being those sides of pair 1 where letter L or R is written in grey font, similarly L2, R2 are those sides of the pair 2 where letter L or R is written in grey font). Now, try the following:

1. Bring closer any combination of L or R sides from both pairs, e.g., L1 - L2, R1 - R2, L1 - R2, L2 - R1), they Repel. This seems to indicate that the polarity of L or R side is identical (both are either north poles or both are south poles), and this is true across multiple apple earphone pairs.
2. Similar to #1 above, but flip one of them and observe Attraction.

The above makes sense, knowing the presence of magnets in each of the earphone speakers.

Recently, a friend gave me a brand new looking open box of earphones (say, gifted pair) that were bought off of ebay, whose wires are slightly thinner than my original pairs, not as soft/flexible as my original pairs, but the quality of sound is as good as my original pairs. Trying #1 above however results into attraction (unlike my original pairs).

Questions:

1. Are All apple earphone pairs manufactured with identical polarity, i.e., L as well as R sides are either all NORTH or all SOUTH polarity?
2. Is it possible that apple earphone pairs are manufactured such that some units have L and R sides with NORTH polarity while other apple earphone units have L and R sides with SOUTH polarity? That is, if #1 above is attempted using one pair from each set of such units, result would be an attraction.

Just trying to understand if my new pair of headphones is a high quality replica of apple product.

Thank you