The phrase "are considerably more extensive" is correct and usable in written English.
It can be used when comparing the extent or scope of two or more subjects, indicating that one is significantly larger or broader than the other.
Example: "The resources available for this project are considerably more extensive than those we had last year."
Alternatives: "are significantly broader" or "are much more comprehensive."
In these respects the welfare state is considerably more extensive in western European countries than in the United States, featuring in many cases comprehensive health coverage and provision of state-subsidized tertiary education.
The former literature is considerably more extensive and developed than the latter.
But many worlds that we know of contain the ingredients to make chaotropic solutes, he says, meaning that this zone may be "considerably more extensive than we could have previously envisaged".
However, digestion of the amino-terminal region was considerably more extensive after carbohydrate modification as judged by a marked decrease or absence of the larger fragments seen when native vWF was digested, and by the appearance of new smaller molecular mass species.
Officials with the toxic substances department have not determined how many of potentially thousands of properties will ultimately require soil cleanup, but acknowledged last week that it would be considerably more extensive and costly than anticipated.
The mayor's data site, said Garcetti spokesman Jeff Millman, will be linked to a new performance Web page (performance.lacity.org) that is considerably more extensive than the one produced last fall.
Our catalogue of characteristic sites is considerably more extensive than those reported in related work.
The ANLV model based on the AQLV does also considerably better than previous models, but it does not match the data as well, as the cross-over in Fig. 11E&F is considerably more extensive, and it is mostly due to an under-attenuation of the shorter movement (red trace).
The individual BDA injections were considerably more extensive, each involving multiple nuclei (Ghashgaei et al. 2007).
