wide variation
wide difference
wide gap

This has led to wide variations in color and dimensions.

There is a wide variation in the success of the programs.

They were not genetic, certainly, but then what did account for the wide variation?

But states showed wide variations in how different groups performed.

There is a wide variation in temperature between day and night.

But their leaves show wide variations even within one species.

There was wide variation in the amount of poor relief given out.

There is a wide natural variation in results from healthy test subjects.

Even at the country level, there are wide variations in infection levels between different areas.

These shows were produced by volunteers and showed a wide variation in quality.