In reality, is there a big gap in workplace status between IBK (Industrial Bank of Korea) and a small/medium enterprise?

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As the title suggests
Compared to a regular recruit employee at IBK, which is a public-sector style bank,
and an employee at a solid small/medium enterprise (fewer than 40 employees, revenue in the tens of billions of KRW (under 20-30 billion KRW)),
which operates in a small-scale domestic industry but is a highly profitable player within its field,
is there a significant difference in workplace status in reality?