Recently, Apple has made in its FCC filings the disclosure about two-antennas in Wi-Fi model. Now there is one more disclosure, it concerns the difference in the dimensions of the Wi-Fi and Wi-Fi + 3G models.
According to this document, the Wi-Fi + 3G model is 0.3mm taller and 0.1mm wider than the Wi-Fi only model, this may be because of the 3G model’s top antenna panel. As you can remember, during the iPad’s presentation in January it was announced about 0.1 pound difference in weight between the models. In spite of the fact this difference in dimensions is very small, it is like to impact the compatibility of individual iPad models with cases and other accessories which are molded for fixed dimensions and which are commonly manufactured to fit tightly on Apple’s devices.