Emma's and Jake's orders get their ids at the same moment, on two different servers. Which kind of id, and what does it give away?

Inside the full comparison

• 6 questions to ask first, each pointing at the products it favours
• 5 problems from the shop, drawn with no product and then once for each of the 6 products: 35 drawings
• One drawing of how each of the 6 products is built, with what a read and a write do inside it and what limits it
• 11 more things compared, one short answer per product, with 96 checked claims and 96 warnings
• 2 scenarios, One database and Public ids, each showing how a changed requirement affects the choice or design
• The interview answer in four moves, filled in for this family
• 27 vendor pages checked in 2026-09, linked next to every claim