I noticed the G's on a couple of the Greyhound Club chips appears to be a little different. The two chips on top are from the Chip Guide. The chip at the bottom is mine. Mine matches the Letter G on the green chip. The green chip has a G that flares out more at the top of the vertical part of the G and is also thicker than the chip next to it. Is there a real difference collectors know about, or am I just trying to see something that's not there?