"does not differ much" is correct and usable in written English.
You can use it when referring to two similar things having very little or no difference between them. For example, "The results of the experiment does not differ much from what we expected."
This correlates with the larger number of EBNA-1 for latency I. Latency III amounts of EBNA-1 does not differ much between different parameter sets since it is determined from the production rate based on the measured number of EBNA-1 molecules (see Methods).
Furthermore, this model does not differ much from one with three different higher-order factors (i.e., hedonic, eudaimonic, and social well-being) [ 56].
"One mad, awful lady living in a poor neighborhood without Internet does not differ much from her mad, awful friend next door who goes online".
Because the report is unclassified, its information does not differ much from what you can read in "open source" reporting such as this newspaper.
It does not differ much from strategies set more than a decade ago by the first Bush administration, which also called for reducing uncertainties and improving the accuracy of projections, some experts said.
Peak displacement in two spans does not differ much.
As a plot outline, "Yi Yi" doesn't differ much from "American Beauty," last year's Oscar winner for best picture.
Not only do attitudes toward guns not differ much by age, but actual gun ownership doesn't differ much either.
Overall, the Windows 7 version doesn't differ much from the Windows 8 release.
To be sure, this doesn't differ much from Democrats or the Obama administration.
Turns out the U.S. doesn't differ much from other industrialized countries when it comes to everyday litigation.
