I agree, the XU4 is way better than the C2. > There is virtually no reason to get the C2 now I disagree with this though. The price difference between the two

I agree, the XU4 is way better than the C2. > There is virtually no reason to get the C2 now I disagree with this though. The price difference between the two isn't insignificant. If someone intends to deploy hundreds of devices for an IoT application the price difference between the 2 would be one of the reasons to choose the C2; the other reasons would be size and heating problems.