You should use the hawk pen otherwise you wont know if you like it better, everyone tattoos different so no ones opinion is as good as you yourself taking it out for a test drive. If you look here and on the trading group in facebook you can see both machines being sold and traded, Ive noticed the Edge getting traded more often. The problem with the Pen is that you pretty much have to use hawk carts as there is possible contamination issue with the grip so if you only use t tech then that edge trade is good for you. I really think you should just keep it though its a great machine and you already have it so why not at least try it out. I like how its not adjustable that makes it always tattoo exactly the same everytime and yes its like a thunder only shorter stroke just as powerful but doesnt hit as hard so clients will like it