Difference between wagon mound 1 and 2 is that wagon mound one descission held on the basis of remoteness of damage and defedent not be liable because it occur unforceably.

And in wagon mound 2 it was held on the basis of likely hood of harm means in this chances of harm were very low but Seriousness of harm were very high and the potential of damage were very high so defedent is in breach of duty.