Just no, they are nothing alike. Gatti was very vulnerable but he did have solid skills, and was able to pull fights out with one punch, that's a lot of why he was in so many great fights I think. Rios is always in tear ups but he's never really come back to win a fight as was said, and he has no skills. He's perhaps been in one great fight which will be the highlight of his career almost certainly, the first with Alvarado, who actually has a lot more in common with Gatti to me. If Rios didn't have a great chin he'd be a complete bum imo, and he will be before long.