These two shirts are together because they use the exact same design. It's the Drop Dead logo with neo-classic Sonic & Tails full color art applied to it. They're set so it looks like Sonic is leaning on the design, while happy Tails is sitting on part of it.
It may be classic styled, but the neoclassic art & cute way it's used helps the shirts stay looking fresh/fun. The left is a tan sweat shirt/hoodie with drawstring hood & big front pocket, while the right is a charcoal gray short sleeve tee. Both of these are called "Dream Team", the hoodie is 60 pounds.