As far as the guys are concerned, only Chai Yai's kid is like him. All the other boys seem different from their fathers. E.g. Chai Pat's son is the only one who is smiling (a big smile at that) when we know Chai Pat is the unfriendliest among the brothers. Chai Pee's son is frowning when Chai Pee is the friendliest and flirtiest. Chai Ruj (assuming the last one is Chai Ruj's son) son has a suave smirk when we all know Chai Ruj is the perfect nice guy gentleman, and lastly Chai Lek's son looks too formal, unlike his dad who likes going to the mountains or something. Chai Yai's son looks too serious, like conservative/stuck-up serious, but he looks the part of the eldest.