What's the difference between an ISSU and a multihop ISSU?

It looks like for me to get to a certain 7k version I need to do 2 ISSUs. Does the multihop ISSU allow me to have both code on flash and it does it in one go, or sequentally?

Specifically I'm looking at

Table 8 Multi-hop ISSU Paths for the Cisco Nexus 7000 Series Chassis

vs

Table 6 Supported Direct ISSU and ISSD Paths for the Cisco Nexus 7000 Series Chassis

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/6_x/nx-os/release/notes/62_nx-os_release_note.html#pgfId-1153213