the obvious bit is the rub strips on the side if theyre thin with no 16v bage on them its a phase 1, it should have a badge around the side repeaters,
it its a ph2 the strips will be thicker & smooth, there will be a 16v bagde in the strip.
the rear lights, on a ph1 have the black at the bottom straight, on a ph2 it goes up at the edges.
the door mirrors will be squarish on a ph1 & larger more rounded on a ph2
the grille on the ph1 has slats in it, on a ph 2 its smooth.
the wheels on a ph 1 are turbines on a ph2 they are 5 spoke speedline vege alloys (especially for renault)
so all in all there are quite a few cosmetic changes ( i havent listed them all, like interior etc)