they're not the same.

L26 are rumoured to be the weakest of the bunch.

L32/26 are powder forged yes, but different rods.

L32's are shorter and stronger. L26 are longer and weaker.

You must use the same rods as pistons.

N/A rods with N/A pistons and so on. But you can interchange the type of N/A rods and pistons.