If I'm not mistaken, K3 is basically the Forte, K4 is bigger. They seem to be following BMW naming model with the number e.g. 3 series, 4 series etc.
I drove Soul(less) for a few days and it was an awkward car to sit in, to drive and cargo space wise, didn't like it a bit.
Rio is very popular in EU, they like smaller cars in general due to tight streets and expensive gas (petrol); I doubt they'll kill it on EU market. But EU Rio is a bit different, seemed larger and more upscale, I rode in one as a taxi passenger.
I drove Soul(less) for a few days and it was an awkward car to sit in, to drive and cargo space wise, didn't like it a bit.
Rio is very popular in EU, they like smaller cars in general due to tight streets and expensive gas (petrol); I doubt they'll kill it on EU market. But EU Rio is a bit different, seemed larger and more upscale, I rode in one as a taxi passenger.