It Depends, and It’s About the Same によって・と同じくらい

Here によって names the factor that changes the result. It often appears in practical explanations: 会社によって違う, “it differs by company”; 季節によって変わる, “it changes with the season.” によって also marks means or an agent in other sentences, so use context to tell the jobs apart.

と同じくらい works with verbs and adjectives. For a broad estimate, くらい leaves room for a small difference; it doesn’t claim the two amounts are mathematically identical.