While I haven't read the whole thread, the OP seems like an apples to oranges comparison.
A more accurate comparison would be comparing these PC gamers to the more hardcore console gamer that ends up with a large library of games at the end of a generation, likely across multiple consoles. If you want to compare the buys-3-games-a-year AAA gamer to a PC gamer, it would be the folks who play little more than the flavor of the month F2P games, or one or two competitive online games, or an MMO, or Minecraft, etc.
To answer the tl:dr, there's not really any way the answer isn't no. You're almost certainly spending more on hardware, spending the same amount on those AAA games, and optionally spending more by buying additional games during sales that wouldn't have been purchased on consoles.
That, and the savings aren't as big anymore anyway. Games take longer to get big discounts unless they bomb than they did several years ago. Steam sales in particular are a shadow of their former selves. Deals are harder to come by and take longer to appear, but it can still work out cheaper for the savvy buyer. But not for someone who doesn't buy much more than 3-4 AAA games at full price per year.