I have actually done both. The Kerdi system is definetely easier but, be ready to spend more money on it then a traditional mud pan setup. The Kerdi drain is PVC so make sure you are going like to like materials or you will need to compensate for that. Other then that its pretty easy. If you can spread thinset and get the waterproofing membrane as flat as possible and air bubble free on the walls, you are in good shape. The pan is pre-sloped which makes it easy and you may just need to cut it to fit. A table saw or circular saw works for this. Same for the curb.. Good Luck!!