if you'll be using it in the winter and/or above treeline, i would personally pass on the akto. although it's billed as a 4-season/mountaineering tent, i think you have to take that with a grain of salt. even a $50 wenzel can be used in the mountains and in the winter. the question is will it hold up to the weather.
the hilleberg site states "it was not designed for extreme above tree line use". the shortcomings that i see compared to the mk1lite are these: 1) i'd worry about its ability to stand up to a load of snow. only 1 ridgepole, while the tent has rather flattish ends that won't be dumping snow that easily. 2) end needs to be pitched into the wind, but usually you can't be so choosey above treeline. 3) the ridgepole is pitched across the width of the tent. it'll take a lot more real estate to pitch, a minimum of width of 66" compared to the 46" of the mk1 lite, yet has about 10sq. feet less floor space. 4) one good fact is that it has about 8 1/2 sq.' of vestibule area. however, only 1 side of it can be rolled up. the other side can be used as a windscreen for cooking only if that side can be pitched into the wind. also, side entry tents' vestibules (i have 2) don't create all the usable space that the largish number might suggest. for storing all that extra winter gear and also cook in, you'll probably end up wanting a hooped vestibule.
the mk1 lite's drawback is the lack of vestibule. however, despite the manufacturer's warnings, lots of people with cannister stoves cook inside tents (carefully & with doors cracked for ventilation). i wouldn't want to try with a white gas stove, though. as far as standing up to the elements, the mk1 is a tried and true workhorse. similar tents like the i tent and eldorado have vestibutles and are also tried & true veterans.