In Series 1 R33's there are no differences in the headlights, in Series 2 R33's the GT-R still had the series 1 R33 headlights whilst the other models gained the slightly different ones. There was a Series 3 GT-R which had different headlights, they are shaped like the series 1 R33 headlights however have xenon lights rather than the usual ones. There's like a squareish light in the inside of the headlight, and a round xenon projector on the outer bit of the headlight. If you don't know what i'm talking about by now i can post pics to explain it better