In addition to the disclosure in Apple’s just-published FCC filings for the iPad that there are two Wi-Fi antennas per model, a separate Apple document has disclosed a previously unknown difference in the dimensions of the Wi-Fi and Wi-Fi + 3G models. According to the document, the Wi-Fi + 3G model is 0.3mm taller and 0.1mm wider than the Wi-Fi only model, in part apparently due to the 3G model’s top antenna panel. This is in addition…