I don’t know if the laptop ones are the same, I only know the desktop ones

1. The most obvious difference on the surface is that the position of the notch on the gold finger is different;

2. The most obvious thing about the first generation is that the IC is in a SMD package------that is, the pins can be seen on both sides. From the second generation, the IC is all in a BGA package------that is, the original pins cannot be seen on the surface. ;

3. The working voltage is different. This cannot be seen on the surface, but generally there will be a logo on the trademark on the memory stick.

For example, the working voltage of the first generation is 2.5V, the working voltage of the second generation is 1.8V, and the working voltage of the third generation is 1.5V