The C5 BLE VI device is the exact same size as the C5 BT. It swaps the BT for a BLE interface, which makes it the VI of choice for iOS applications. The OpenXC iOS framework is coming soon. The other differences for the C5 BLE IV is that there is no SD card reader and the OBD-II connections are updated to connect to both CAN1 and CAN2-1.
The easiest way to differentiate a C5 BT from a C5 BLE VI device is that the BLE device has all OBD-II pins populated while the BT has only a subset of pins. A second difference is the lack of a receiving slot in the SD card reader hole in the plastic housing on the BLE device. Or, you could always label them!
For complete details, see documentation here.
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