As has been alluded to, you must consider the interests behind each source, reporter, and publication (I will just talk below about US vs Russia, as the West-East divide seems far to large and imprecise to talk about differences in objectivity).
In general, publications want to keep existing, which means their directors must keep happy those who provide their financial resources. In the US this typically means fulfilling readers and the publication's owners political interests (what they think should be produced; these can be your typical ideas of liberalism and conservationism, or even science, art, and money). In Russia news publishers are more biased toward the owners political interests but because they are not all completely subsidized by the state, just more often persuaded by it, the paper must still satisfy readers' politics.
While the reporter also seeks financial resources, they live within a broader culture of ethics, morals, and norms that will influence their capacity for objectivity. Are the journalist cultures in the West and Russia different? How do we show that they are or are not? In both places there are similar formal rules about investigative journalism and reporting, and in both places these rules are broken. Taking from 'Sturgeon's revelation', it is important to assess the best 10% (PBS news hour, political science journals and newsletters, reputable surveys, new yorker, lenta.ru, ) and not wade through the 90% of crap journalism that is inevitably inherent everywhere (CNN, Foxnews, Wallstreet Journal, Nytimes, pravda, RN). When looking at that best 10% of journalism, in Russia there remains substantial physical and financial fear to refrain from reporting objectively. In the US objectivity is curbed by personal and cultural subjectivity and financial interests. Currently in Russia the physical fear and financial fear come from the same place and have interests in maintaining a singular national power. This means that the careful reader can more easily observe and account for bias in Russian publications than in the US whose objectivity comes from multiple venues, but this does not mean that their is truth within either a Russian or US article. Rather it means it is easier to assess bias in Russian publications than in US publications. I believe, to get clarity one must investigate on their own and evaluate the information and knowledge claimed.
Sources of information, whether they are from a scientists or political activists, also have political interests. While if we have sorted out the publication's interests and the reporters' we should be able to determine how a source is found, its quality determined, and how it is used, investigating the source is another important element to being properly informed.