I believe you cannot tell from just removing the jet covers. You'll need to remove the jet block which requires you to remove the accelerator pump from the bottom of the body. Don't worry it's not too hard to do, just don't lose the ball bearings when you remove the top cover (part of accelerator pump assembly).
There might be a way to tell if homogenous / independent with the block in place, I believe what you need to do is remove the pilots and use a thin bit of wire and probe it down into the jet block (where pilot sits), if it goes down into the accelerator pump area (straight through) it's independent, but if it encounters resistance or has a turn, then it's homogenous. (The Mikuni Manual makes reference to this, but it's not very clear looking at the diagram vs the carb bodies themselves).
From what I have gathered, homogenous was used more or less with OE equipment (say Toyota's etc..) and independent (better for racing) was used as aftermarket carbs. The homogenous design is apparently meant to feel very much like fuel injection (smooth transition) where as independent may not be as smooth. This is all second hand information though and not information I've managed to verify for myself. So open to correction.