What's the difference between a Hobonichi Techo and a regular weekly planner?

The Hobonichi Techo is a Japanese cult-favorite system known for thin, fountain-pen-friendly Tomoe River paper and a flexible daily/weekly layout. It carries a premium price versus mass-market planners, and verified-purchase reviewers rate it highly, but it's a daily-grid book first, so confirm the specific layout (daily vs. weekly accessory) matches how you actually plan before buying.