首先price difference是中翻英,我觉得英语应该是 different prices,或 difference in prices。你可以换一个问法:Are they at same price? 或 Are the prices different?
Does the "supreme" one worth the price difference?
这句简直太中文翻译英文了,我会说 Is supreme a better/good deal?
不一定正确,仅供参考:)