They are two different animals. The PT3 coils are like the originals but with two coils. While the "new" coils are also duals, they look more like a micro carto. The PT3 duals work in the Mega and visa versa. So far I don't think anyone has pulled off a rebuild of the Mega coils as of yet. I plan on breaking the one I have down but just haven't gotten to it yet.
The new coils should make your PT3 rock! But then, so will the cotton.
The new coils should make your PT3 rock! But then, so will the cotton.