You are right to say that a silver card will hold more information than a gold card. As they contain different chips. I have no experience of silver cards, but I would have thought that if you used the same hex. Then the silver would be no less susceptible to ECM’s than a gold card.
But I could be convinced otherwise <img src="biggrin.gif" border="0">
Regards<br />Diamond <img src="smile.gif" border="0"> <img src="smile.gif" border="0">