Knowledge User Count is update via schedule job "Count Knowledge Use", so the results will be update on daily basis after the job runs.
Knowledge View Count related list shows all counts.
Knowledge View Count in the article only shows the count defined in the system property glide.knowman.view_age.days
Please see documentation about the system property mentioned
Its expected the Knowledge View Count in the article differs the View Count in the tab due sys property glide.knowman.view_age.days