When you closely look at the modus operandi and professionalism displayed by these two internet secrets leaker, you would know there is a slight difference in the approach they give their respective work. Snowden Edward and Julian Assange are well known for their unrelented effort to always leak information which might want to pose a security threat to the government and also the citizens.
There are so many corruption related cases of the Government that had been leaked out. One notable difference between the two is their attitude to the impact their leaked information might have. It has been reported on many occasions how snowden would be working with other journalists who would use the discretion in deciding what part of the information should be leak.
This is good to a certain extent because of the damage those leaked information might cause to the people and the Government. Julian Assange doesn't seem to have the same discretion towards deciding what and what should be published to the internet