15500 is one of the hottest Audemars Piguet replica watches on the market, it is also the Audemars Piguet replica watch I suggest you buy for your first replica. There are many factories producing this replica watch, I recommend VS and APS, here is the comparison between them.
On the following pictures, the left one is from VS, the right one is from APS.


First, dial color. Both are blue. But on VS, the blue color looks lighter.


The solid center pinion on the VS hands looks more noticeable.


The date font on the APS looks slightly whiter, while the background appears a bit bluer.
The date font on the VS has a slightly yellowish tint.


On the APS, the tip angle of the minute hand doesn’t look as natural as the one on the VS.


As for the AP logo on the dial, the legs of the “AP” letters on the APS are relatively straight from top to bottom.

The movement from APS is a super clone 4302 with real free-sprung balance wheel that features weights. VS’s balance wheel does not have the weights.
The last difference, and in my opinion the biggest one, is the bracelet length and the flexibility of the end links. The VS bracelet is slightly shorter than the APS, and the end links on the VS have a greater range of movement. On the APS, the end links are more fixed in place.
This means that if you have a smaller wrist, the VS 15500 may feel more comfortable to wear. If you have a larger wrist, I would recommend going with the APS.