I understand the comparison. These are both rifles which served in the same era (sort of, both saw time in WWII though to much different extents. Of course both were used in Korea). Though they are very different weapons, they are both nevertheless issue weapons for major nations meant to be used in combat in the mid-20th century.
Now, what I really believe people take issue with here is the fact that .30-06 obviously outclasses 7.62 Combloc by a wide margin. That's not in dispute (or atleast shouldn't be), and most people just like feel and aiming of a Garand more.
But, if you are trying to pick a fixed mag rifle, you are limited to a few weapons, and if you don't have much money, and you're not all that concerned with shooting over 300 yards, the SKS might be your selection by default.
No, I wouldn't compare these two weapons the way the OP did, but I wouldn't say the comparison is invalid, and he makes it very clear that if price of weapon+ammo is 1/2 or more of your consideration in buying, the SKS is pretty much the way to go.