Welcome & you have stumbled upon the classic replica dilemma - what is the difference between a $300 rep & a gen that costs 10+ times as much?
In most cases, it comes down to fit & finish - those tactile issues that are difficult to quantify (&, in some cases, quantify) for some buyers. At least in the case of Rolex watches, the differences are quote palpable & just about anyone who holds a gen in 1 hand & a rep in the other can immediately understand why the gen costs more. Now, whether those differences are worth the additional cost is up to you. Beauty, as they say, is in the eye of the beholder. But, after spending a bit of time modifying rep watches, I can tell you that I have yet to see anyone turn a sow (rep watch) into a silk purse (gen watch). You can always feel the difference.