There's no question in my mind that "Venom" inspired "Toxic" in name and look.
There's no doubt in my mind that you did this for profit.
There's also no question that you've altered it enough (this time) for it to appear non-identical to a skinner. On that part I won't comment.
Instead let me just say that "non-identical" does not mean "original".
When you look at it do you find yourself asking, "Hey, that's a great skin!" or, "Where have I seen that before?" ?
I regretfully ask the latter.
I think you should have asked vStyler permission to do your variant of his theme. I think you should have at least tried come to a commercial arrangement with him before proceeding as you did. I believe you owe him an apology and other considerations.
I don't expect you to agree. I expect you will find a way to turn this thread into a provocation to the members here who strongly disapprove of what you've done.
I believe you should have used your graphic abilities to create a new theme conceived and executed by yourself.