Tire question BF Goodrich KM2's ...

[ehaser]

Can anyone tell me the difference between these two tires? I'm probably going with a 22x12 wheel and would like these since they come in a 335/55/22.. My question is that the pic of the KM2 on their site shows more siping ... I've included a few pics from other hummer owners and their KM2's look different?? Can anyone explain? Also, I'm trying to figure out if this setup will fit without a lift? The overall diameter is 36.5 but the width is 13.2
I'm concerned that I may have to go with a 20 inch wheel setup since they make an actual 37x12.5x20 inch tire. I wonder if the decrease in tire height will allow for the increased width.