I have used this and the red fit foundation from Tirtir and I love both of them. I do not notice a big difference between the two. I think that the red has more coverage, but this one is so very similar. There is a color difference between the two, though. This one has lighter shades even if it is the same shade in the red one, it is still lighter, for some reason. The staying power is also really good with this one.
Best for travel as the original case is way too big and bulky. Be careful as some of the mini ones can have dried out cushion sponges - happened to the one I picked up in Japan not the one from stylekorean.