I would call my brother a geek, a collector of shit, expensive cards, moulded plastics, I love him for it but I see it as vapid. Whereas I am a nerd, I research and act with caution when it comes to spending, I own a mechanical watch which I can repair myself, I buy leather shoes with soles that can be replaced at a cobblers, run Linux on my desktop, custom ROM on my phone.

Geeks are nerds who enjoy gimmicky things, nerds are geeks seeking purpose.