iPhone 4 Verizon/Sprint Cell Antenna Longer Than ATT one?

I bought a replacement speaker assembly (with the cell antenna and mini connector already glued on) to replace in a Sprint iphone 4, but it doesn't seem like the BNC connector reached all the way up there around the riser screw. I'm assuming the ATT antenna is shorter than the one used for Sprint and Verizon (Verizon I'm assuming going by the tutorial pictures since it looks longer). Can anyone verify? I need to buy another assembly if that's the case to fit the Sprint replacement.