I have tried Man Man Unagi before Uya. Hence, Man Man has raised the standards for Ungai Don and I have certain expectations when trying the Hitsumabushi Unagi set at Uya. While Man Man has to queue, there isn't much queue for Uya.

Based on my recollection, the prices for Man Man and Uya are around the same. Advantages for Uya are that they sell a wider variety of food compared to Man Man. However, given the prices, I will still go for Man Man as its quality and taste are better. If you are craving for grilled Unagi and you are around the Orchard area, Uya is still a fairly good option.