How the Types Are Similar
Every type shares real territory with every other type — that's why mistyping is so easy. Compare any two types side by side (wings included), see exactly what they share, and learn the one question that tells them apart.
Compare two types
The nine wing mirrors
Adjacent types with wings pointed at each other — 4w5 and 5w4, 8w9 and 9w8 — are the most-confused pairs in the whole system. The blend is nearly the same; only the base note differs.
Every type's look-alikes
For each type, what it shares with all eight others — and the tell that separates them.
Similar behavior, different engine. When two types are hard to tell apart, the question is never "which behaviors do I have?" — it's "what am I afraid would happen if I stopped?" If the answer still doesn't settle it, the mislabelings guide covers the clinical look-alikes too.