(exp, n) six of one and a half dozen of the other; scant difference
君達は自分の提案が最高にいいと思っているのだろうけど、僕から見れば、五十歩百歩としか思えないけどね。
You guys seem to think your proposal is far and away the best, but as far as I'm concerned it's all six of one and half-a-dozen of the other.