sterretje:
The one is for an Arduino, the other one for a Pi ?And hence I suspect that the Arduino one requires 5V and the Pi one 3.3V.
For the rest, no idea.
As far as I can see, both are compatible for Arduino
spycatcher2k:
One is RED & one is BLUE, with components in different locations, and the antenna laid out differently.
So does the first one (the Red) which is much smaller also has an antenna?
And does it mean that in the bottom line they serve for the same purpose and can use the same Arduino's library?