The professional vs. amateur reviewer

FeaturesThe professional reviewerThe amateur reviewer
Revisions per year30 to 1001 or 2
Time to reviewDays (< 15)Months
Review focusArticle contentReferences
Suggested referencesKey missing referencesTheir own irrelevant references
BiasAbsent to mildModerate to severe
CriticismConstructiveDestructive or absent
The perception of its roleConsultant to editorActing editor
PrejudiceAll articles can be improvedNo article is innocent