There's little to choose between them; much of a muchness, referring to two things or sides that are very similar or equally good/bad.
这两款产品的功能差不多，价格也相近，真是五雀六燕，让人难以选择。
The features of these two products are similar, and their prices are close; it's truly a case of much of a muchness, making it hard to choose.
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