Yes..if you swap 3/6 wires on the posts and the misfire moves, then it's the coil. It's not common for our coils to break in that manner though. This is because the coil fires both towers at the same time. Hence why our system is called a waste spark setup. One of the two cylinders is always firing on the exhaust while the other is on the compression.

More than likely it's the wire at the O2 sensor where #6 is touching.