Contrast= difference Comparison= same
Normally it is "in contrast with..." But "to" is used when the difference is being emphasized.
Contrast is the difference between the "empties" and the "fulls".
Contrast is the difference in light and/or gloss that hits an object distinguishable. In ocular perception of the real world, contrast is resolved by the difference in the color and brightness of the object and other.
Contrast (in pictures) is the difference between the darkest and lightest colors.
Comparing two things is finding what they have in common, contrast is how they are different.
High contrast refers to a large difference in brightness between the lightest and darkest parts of an image, resulting in strong visual impact and sharp edges. Low contrast, on the other hand, has a smaller difference in brightness, creating a softer, more muted look with less distinct separation between tones.
Discrepancy means a degree of difference.
Recruitment is looking for people to voluntarily fill a position. Conscription is forcing people into a position, most commonly governments forcing people into the military.
Recruitment deals with advertising, scrutinizing resume and short listing of candidates for an interview. on the contrary placement is placing a potential candidate in a job. It is an end to end process. It sometimes involves training as well.
Variety
Police recruitment is the process of selecting new personnel that will fill the vacancies created due to the death of other police officers or the need to hire more.They get tested of many things to make sure they are fit for the job.