Latte art is an incredibly fun and calming thing to do. I’ll link a video after this comment on how it’s done.

Yes; cold brew is brewed without heat, while iced coffee is regular coffee brewed, then iced and diluted. The end product for cold brew is smoother, has less bitterness, and more caffeine (since it brewed longer than 5 minutes). The nitro version infused nitrogen into the drink, and helps the caffeine hit quicker.