2 Chinese Coins Help Please

Both bear the legend of cash coins of the Qian Long emperor (see your previous Chinese Cash thread for a genuine example), but these ones, I'm afraid, are both replicas. The border is too narrow on the right one, and the one on the left looks very badly rendered.

Probably made as Feng Shui amulets, the left one made by someone who cannot read Chinese, since the characters are now too garbled to read.

They are indeed all different, and all of them (except the ones on the left, which are the same as the two pictured in the OP) appear to be genuine. There is considerable variation in the size and quality of genuine Qian Long coins; they were made for a very long time. This particular variety, with the bottom-right piece of the top character "looks like a fish-hook", dates from roughly 1774-1793. Any you might encounter where this part of the top character "looks like a Z", are earlier. But the one on the left has rims that more resemble Song Dynasty coins, 1000 years old or so; too thin for modern coins.

As for the other one being "badly rendered", well, it's like comparing a picture of an actual coin with a child's drawing of a coin. The same features might be there and be recognizable on both, but on the child's version they're just badly drawn. Look at the edges of the hole, for example - they're not even straight lines! As for the hole itself, it is clear that this coin was never put onto a square metal rod - part of the process of making genuine cash coins, in order to file the edges smooth. A look at the rim also shows the edges were never smoothed on this coin.

Finally, finding genuine and fake Chinese cash all mixed up together is not uncommon here in the West. Go into pretty much any coin dealer in Brisbane (or anywhere else in the country) and you'll find a bowl labelled "Chinese cash coins - $2 each"; in that bowl will be a mixture of fake and genuine cash coins. They simply don't know enough to tell the difference, or if they do, since fake cash and genuine cash both cost only a few cents each, they don't see any point in putting them in separate trays. So any non-expert customers buying cash coins from them will also likely buy a mixture of fakes and genuines.