What you may well find out is that the camera from Royal is a 'gray market' camera. Shipped from another country without the Olympus warranty. I have never purchased from Royal, but looking at feedback on other sites, it seems they don't have many happy customers. If you do a little searching, you will find these feedback forums. In electronics, if it seems too good to be true, it usually is.
Here is what Royal Camera's fine print says...if you can find it on their site...
"Everything that we sell is brand new and factory fresh. We reserve the right to limit quantities. We are not responsible for typographical errors. All prices are after the manufacturer's rebates. Items carry either overseas, USA or Royal warranty, USA warranty may vary in cost.Please allow 3-4 weeks for delivery of international items.some international products may not include english manuals.
Pictures are for reference only. Some pictures don’t accurately depict the model."
Of particular concern in 'gray market' items is the non-English manuals.
If your Chinese is good....go for it.