"show little difference" is a perfectly correct and usable phrase in written English.
It is used to indicate that the difference between two things is very small, or barely noticeable. For example, you may use it in a sentence like this: "The two candidates showed little difference in their opinions on foreign policy."
Since the different weighting methods show little difference in terms of the resulting risk predictions, further results are presented based on the Prentice scheme only.
Professor Robert Coe, of Durham University, said: "It is interesting that Pisa test results for the UK show little difference in maths, English and science for recent years.
Studies comparing states that have extended jobless benefits to states that haven't show little difference in how quickly, or slowly, the long-term unemployed return to work.
Comparisons of factors such as heart rate and blood pressure show little difference in responses between men and women towards their new-born babies.
However, wells in the Austin Chalk, a naturally fractured reservoir, show little difference between the forecast accuracy from the various DCA methods.
The present study, using analog participants, found that the CARB-97 and WMT differentiate "normal" from "malingered" instructional sets, and show little difference between naı̈ve and coached malingering efforts.
The results show little differences in the BOLD-signal time courses within the auditory pathway.
Furthermore, experts and novices show little differences in the way they search the Internet.
With the exception of canakinumab pharmacokinetics, temporal profiles of mean concentrations show little differences across dose levels.
Chondrogenic differentiation showed little difference between cells isolated from different cord regions.
The results showed little difference between their hydrating properties.
