Pictured are 2 different BVC coils. The Coil on the Right of each picture are coils I received with my Aspire K1 starter kit:
From the same website I then purchased some replacement BVC coils, this coil is pictured on the Left.
As you can see they are different, the one on the Left has bigger holes on the sides and a different air hole at the bottom. Both have Aspire BVC on them, both have 1.6Ω (3.0 - 4.2V) on them, both have 201330324987.9 on them. The one of the Left has a CE on it.
Are they both genuine, if they are why are they different?