It's the type of debate which keep dedicated followers from both sides of Glasgow going for hours. And who better than the esteemed Record Sport duo of Chris Sutton and Barry Ferguson to offer their best combined Celtic and Rangers XIs based on current form.
The duo are veterans of one of the most visceral fixtures in world football and know exactly what is needed from the players who cross the white line in the hunt for three points.
But who's in, and who's out? If a fan of either team had been living under a rock since the start of the season there are some selections, from both, which would be a shock to those unaware of the season which has unfolded in Scottish football.
And here is the XIs the Celtic icon and the Rangers legend have conjured up. JACK BUTLAND He was a kid coming through when I was at Birmingham and always had the confidence to make it big.