there is completly different algorithm to look for patterns in korHarmonics and in AMPmonitor, so you will not always get the same results.
pattern definitions are similar so in majority of cases both tools should give you the same pattern.
it is also that multiple patterns are appearing on the markets in the same time, so you can have some different harmonic patterns on 1 timeframe indicatored by korHarmonics and different indicated by AMPmonitor on another timeframe.
In any case, the prerequisite is that you understand the patterns and their locations before you use any of these tools
on this forum there is a lot of materials how to spot pattern, how to confirm the pattern or the entry. For example, here for the Gartley pattern: Gartley pattern - table of content