if you read the link he gave, it has a really good description of each...

but to summarize...

A tutorial: - is learning-oriented - allows the newcomer to get started - is a lesson

A how-to guide: - is goal-oriented - shows how to solve a specific problem - is a series of steps

And as an example, Don't list how to install node.js, npm packages and ENV settings in your HAPI server tutorial

Level of previous knowledge assumed, tutorials tend to be more "starting from zero", and scope, guides tend to have a narrower focus.

A tutorial is to an integration test what a how-to guide is to a unit test.

Think of how tos as recipes for different scenarios