I honestly wouldn't worry about the comparisons guys. As long as they are still to good thrash bands. Its when you start getting ones to the likes of My Chemical Romance that you need to start worrying.
Just keep going with the Evile sound and if it gets compared to Testament, so what. Take that as a compliment. A lot of stuff has been done already so if you manage to come up with something that sounds like it hasn't been done before you will be hailed as bigger geniuses than you are now. Keep it up guys.