Any performance different between MERGE and MATCH if pattern exist?

Neo4j Graph Platform Cypher
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1

For ex:

MATCH (student:Student{id:123})
MATCH (class:Class{name:'Cypher101'})
MERGE (student)-[:ENROLLED_IN]->(class)

In my db, the relationship ENROLLED_IN is 99% exist most of time, just need create first time.

So assume they are all exist, does any performance between the MATCH version?

MATCH (student:Student{id:123})
MATCH (class:Class{name:'Cypher101'})
MATCH (student)-[:ENROLLED_IN]->(class)
2

I don’t think so, as merge is described as a match followed by a create if the pattern does not exists.