There is a node structure for SFRX that extends the EGEM quarrynode system. We always advertised since launch that SFRX would be part of EGEM and also mentioned that anyone who held the basic quarrynode on EGEM at the snapshot would get enough SFRX for a basic Sapphire node.

Tier one quarrynodes are 10k EGEM and tier one Sapphire Nodes are 20k SFRX (which you get in the airdrop). You have to run the EGEM node to run the Sapphire node but they do not need to be on the same box.

The ecosystem is designed so that both sets of nodes reward the other nodes plus each other (EGEM and SFRX) in the DEX listing trading and even in the Mining processes, and the tiered system is designed to reward bagholders with a separate pool of funds that supports network integrity.

More details will be released on this program shortly and I think someone else was nice enough to reply with the EGEM quarrynode system specifics.