It would be stupid to lay out all the details publicly but anything I already know is what is already available online so I will just post it. I'm not sure why you're asking this question either.
As I understand they are both continuing from the same manufacturer, but have slightly different prices on a couple products and titan only accepts cash in mail, sponge also takes bitcoin. My other comment here mentioning the email address was hidden which I guess should answer your question, no... I think sponge is only a member of a different discussion board (thinksteroids).