Thanks so much, glad you're digging the poster!
In terms of the T-Shirt, we wanted to incorporate the spikes into the image. Hence the border :/
The original pictures that were posted were mockups, the actual T-shirt doesn't come off as blocky as those images do (we've since put some real pics up). Hopefully, you'll like 'em once you have it in hand :)
Love the poster design SO much. Looks amazing! (A little bummed that the t-shirt design has that big border around it, would've looked even better without it.)