fondamentally are the same card , but one have separate composite input/output , i guess the sandwich one is newer version maybe for to save 1 nubus slot , both cards have printed on it truevision everywhere and at boot time shown

'TRUEVISION' 1,3 ROM splashscreen. i have buy lot of old nubus cpu and pulled out from. since the 1.3 room is very old , i think the first version maybe the ex owners flashed with old rom then making them garbage.