So, you should understand the process of what you're doing with the gedcompare... you are in the process of importing your records into WikiTree, and are comparing each person record with what's already in WikiTree.
Therefore, if you skip [importing], then that person from your record will not be imported (because you think its already in WikiTree).
If its a maybe, then you should examine the details of the person already in WikiTree and compare in more detail with your records. As Dave says, usually its easier to manually enter someone later that you skipped by mistake, than it is to import a duplicate and have to merge them back together later.
The key is...we really want to try and avoid adding duplicate records.