There's a number of competitor models that can be compared against the GLA... some will be larger, faster, higher, have more toys, etc... but none will have the 3 pointed star on it, which makes a big difference in the 'luxury' stakes when parking outside a restaurant... the new Qashqai is very similar to the old one and it has little presence or personality... the KIA has more design stand out than the Qashqai !!!
So buy the Qashqai for practical reasons if you want few millimeters more in the boot, but it won't feel the same as driving the GLA about...