Yup, pretty much everything in Japan is going to be the same as shipped over here. The retailers PAINT on the orange tip.
On a side note, you might get a gun that shoots even slower from japan because of their new laws; the ones they keep in Japan have to be less than 1J or .98J or something like that, the ones they export can be over.
Depends on the company, but a lot are still not following the new guidelines.
In closing, you'll get the same gun, just have trades and a regular flashhider... if you want to bring them to the states, the flash hider will have to be orange, and the trades will have to be covered/removed.