Neither are very good from a screen printing standpoint. They are both great ideas, but executed badly. Try removing some of the individual scale detail so the person can focus on the shape of the dinosaur and the main details, like their eyes. I screen print shirts for a living. I have to contact people every day and tell them that their designs won't work because it would end up a black blob on the shirt. That is what these would end up looking like. They look great on the screen, and they could look great as a shirt, but not with the amount of detail you have. Screen printing is how you get the design onto the shirt. It lasts longer than iron on transfers.
the first one is much better
I like the first one better.
in my opinion t-shirt in v shpe looks better