If you're discussing a type of object that has such a wide range of magnitudes, describing it as orders of magnitude difference is a good descriptor. For example, the size of stars. One star may be ten times the size of another. Another may be 100 times the size. The next may be 1000 or 10,000 times the size. You wouldn't simply say that stars have a wide range of sizes, you would say that they have orders of magnitude difference. Likewise, you could say that one star may be several orders of magnitude larger than another.

9 is much bigger than 1.

900 is much bigger than 1 and (two) orders of magnitude greater.