I'm kind of familiar with the seed bonus as far as how you earn it, and what you can spend it on.

However I don't understand why one torrent will cost,
55.783 Seed bonus Points per day (2.324 points per hour)

Meanwhile another torrent will cost,
1531.463 Seed bonus Points per day (63.811 points per hour).

Can anyone explain why they cost different amounts?
What is the amount based on/determined by?
Or does the system randomly assign a Seed Bonus cost that isn't really based on anything?

Thanks for any insight you can provide.

I think you posted this question twice.  It's based on the size of the torrent.