I've run help command on sequelize and saw that there are two different commands with the same description:
$ sequelize help:migration:create
Sequelize [Node: 6.9.5, CLI: 2.5.1, ORM: 3.8.0, mysql: 2.5.0]
Loaded configuration file "config\config.json".
Using environment "development".
COMMANDS
sequelize migration:create -- Generates a new migration file.
sequelize migration:generate -- Generates a new migration file.
Is there any difference between them?
No difference: migration:generate
is alias for migration:create
https://github.com/sequelize/cli/blob/master/lib/tasks/migration.js#L20