My neighbor recently purchased a Dell with a Dell A960 printer. This printer crosses to the Lexmark X6170 model. Ink cartridges for this printer are twice as much at Dell compared to the prices at Best Buy and Office Max for the Lexmark equivalent. The people at both BB and OM say the cartridges are different between the two brands. Any thoughts??? I am thinking they probably would interchange ok, they look very similar from the online photos. TIA