The slovenian "colour edition" that u linked is the standard coupe without sport pack.(the wheels look to be a different style)
The only difference is the part directly under the headlamps is coloured black instead of being silver painted.
The "gt line" looks different on the front ,there is continuous body colour under the headlamps.
The full sport pack should fit all megane III coupes except rs versions.
The sport pack may not fit regular(non coupe) megane III at the rear but the other 3 pieces will.
The Meg III coupe at the rear there are 4 different styles.
1. is the standard one like the slovenian "colour edition" or UK expression.
2. is the like sportpack rear. there is still a black plastic line in the middle.
3. is the whole rear is all the same as the body colour, no black plastic visible
4. is harder to describe.. from the sides it looks like the rear is all one colour ,but when you move around to the rear of the car the body colour on the plastic only extends for about the width of the wheel and tyre on each side and the centre bit is black.
Are you thinikng of buying a coupe new , or are you just wondering if the pieces will fit a car you already have ?.
If you are buying new, the bits will come painted and fixed to the car .
If you are looking for the kit and already have the car, check
There are suppliers there from Poland with the sport pack kit or at least bits that look the same. . You would have to get the parts fixed and painted.