It doesn't mean two objects are physically merged; they're just very similar.

Not Literal

Use it to emphasize no noticeable differences, even when small ones exist.

Difference Nuance

It's often used when two people or items are wrongly thought to be identical.

In business, it highlights an inseparable relationship between concepts.

Focuses on how consumers see no difference between two business elements.

Implies maintaining a consistent image across different products or services.