Amarin has the patent on its superior encapsulation, which affords better lab and clinical results than the encapsulation that generics are using.
This introduces the question of whether generic V is really "biosimilar" to Vascepa!...It is something that Amarin or a BP that acquires should explore.
Epadel is in gel caps with individual doses packaged in a high barrier foil packet. Most likely MA inside the packet too. There's more than one way to skin the oxidation cat and Mochida went the packaging route vs loose pills rattling around in an open to atmosphere bottle with a thicker gel cap. So you really cant say if Mochida would be on par with Generic as it's a different system entirely.