Purchase A Swiss Two Tone Blue Submariner Replica Watch

I am currently interested in purchasing a Swiss two tone blue Submariner.
But what I have noticed is that the pictures used for the lower priced
Rolex are the same than the pictures used for the more expensive Swiss
ones. What are the real differences between the 2 watch types? I was also
wondering how long will it take or what will let the gold platting fade away
? One last question, are the Rolex replica UK sold on this site waterproof, can I
swim with them without removing the gold plating and/or get water inside the
watch?

It won’t be me doing the purchase but my brother who lives in the Netherlands. If it’s not possible for him to pay with western-union but just with a bank transaction, will I still have the ability to get my watch made waterproof?

Is there anywhere on the website while I’m ordering the watch that can indicate that my watch has to be waterproof?

And when I receive it, how can I be sure that it’s waterproofing, before I test it and it turns out that it’s not my watch or something went wrong or something like that and it’s not made waterproof? Sorry for all the questions, I just want to be informed, I want to know as much info as possible so nothing goes wrong.