I don't really trust the specifications mentioned on replica websites. dealers never update that information. but rep factories produce new releases and overtime the fluctuation of the rep watches is different. for example, my Daytona weights differently form my friend's Daytona, even if we got it from the same dealer and the same model, with the same ref number, the only difference is that I got it 2 months earlier than him... turned out that during g those 2 months, the dealer got a new release from the rep factory and the new release came with 2mg more lightweight.
the solution for this issue is to message the dealer right before buying the rep, asking the exact weight. then. you decide if it comfort u.If not, you either look for another dealer asking the same question, or wait for a new release in the hope that the weight will be identical.
of course, I admit that not all the dealers say the truth, but at least, you try. you can even tell the dealer that you will return the rep watch if it doesn't match the weight he promises you. who knows? maybe he decides to tell you the things how they really are...