I very highly doubt they are one and the same; they look different, one was named and the other was not, one of them is also about 22 years old and anonymous, whereas Redclaw was not only named, but he probably had a back story to him that was never explained, but it probably involved Screech and Thud, and had something to do with Chomper, Ruby, and why they came to the valley.
We will never know, now that the series has been canceled, unfortunately. All we can do is speculate. I will say this, however, that "fan logic" and the logic used by the writers tends to be very different; the former often wishes to see things that would be interesting, but makes connections that aren't really there in the process.
Still, its all imaginary anyway, so feel free to speculate.