The iPhone 4 SIM card is the not the same as the others. It’s missing the AUX1 & AUX2 pin-outs. Which are the contacts for use with USB devices. Such as connecting your mobile phone to your car, via USB.
(AUX1 is the USB D+ pin, and AUX2 is the USB D- pin).
The pictured SIMs are from Telstra. And no, I don’t know why Telstra decided to use a different SIM for the iPhone 4.