Hi,
I'm from Europe, so I'll try to help a little
First of all, the EDM tails will fit your USDM car. I did such swap, only different way, installed USDM tails on my '93 EDM Legacy. The wiring is like 1:1, only the EDMs have the rear fog lights (inner lamps), so it's up to you, if you wire the additional switch for them or just hook em up to the brakelights and have 4 of them
AFAIK only the MY92 Legacy had white turn signals, the later models had amber blinkers, i.e. my '93 had also amber, so I swapped with MY92. Of course you can try to get rid of the amber insert from later tails, but it's a real PITA and the turn lights lost their characteristic. (believe me, I did it).
here a little comparison: my Leg with MY93 tails
and here the same car with MY92 tail lights
here as I swaped with the USDM tails
As for the trunk panel, it's also a EDM thing, or ADM, cause only the euro Legacys and aussie Libertys had such rear garnish. It's not paintad, It's just to mount the license plate. Just ask the guy who's selling you teh tails. maybe he has one for sale. or ask me, I got mine removed
Or you can paint your USDM to match the rest...
I hope that clears something up
![Very Happy :D](./images/smilies/icon_biggrin.gif)