They're not similar though, one is a physical product that you can trade, give away or cover your siblings property with, the other isn't.
I guess our definition of similar is different. Although one is physical and one digital. They both have a psychological value. A pack with Barnes, Rush, Stracham and a Norwich city shiny was worthless to me. I already had 10 of each, and so did everyone else.
I see that both systems result in lot's of junk paid for. Granted, the stickers could be swapped with other collectors. But given the "odds" of getting many stickers, it would be impossible for everyone to make the book complete and not have to spend money chasing the missing one. Kind of like a pyramid. There is always a surplus of duplicates. If you were lucky to get a few rares, then your chances of making a complete book through trading significantly rise. You unlucky? No rares to trade? You're gonna have to play the game of chance and buy a few more packs if you want to fill more spaces. In the social circle, the kid with the most complete book during the season was "winning".
I will add that i am not against the packs etc. For us older guys, i think we should be able to make our own choice. For the kids, it's up to the parents. I never finished a book. But do have great memories standing in the yard, got, got, got, NEEEEEED! Random Gordon Strachams stuck everywhere. Tennis courts, park benches etc.