The type of car is only a part of the snow equation, and often not the biggest part. My opinion is that success in snow is 25% car, 50% driver and 25% tires.
Since you are, or are not, a good snow driver (only you can tell that), this leaves the type of car and the tires.
for the type of car, any light FWD car has its strong points and its limitations. Going up a slipper slope, for instance, is not something a FWD car does best. But with 4 snow tires mounted on the wheels, a FWD can be pretty sure-footed in most conditions.
As for "freezing rain", there's nothing much that could help you there--your car is held, after all, on 4 patches of rubber, and if those 4 patches are on sheer thin ice--well even 8-wheel drive doesn't matter.
I'd say that if you were not too happy with the Altima but you ARE willing to mount 4 dedicated snow tires, you might be fine with the Kia for everything but the deepest snow (where the car could get hung up due to low ground clearance).
But if you aren't willing to invest in 4 snow tires, then the Kia probably won't be any better or worse than your Altima.