The second one has thicker wheels, which I like better; I guess they wouldn't get sick in the mud. But I also like the first one's mechanical-looking arms.
I think the app should have an option to enable ads, and at the end of the day you get paid a few cents, like a faucet. It'll help new users and people without access to an exchange.
It would be very useful if memo would convert the bch address into a clickable link. Then on a mobile it automatically opens any wallet that understands that format.