It's important to clarify that SFP (Small Form-Factor Pluggable) and Ethernet are not directly comparable, as they serve different purposes within network communications. 

SFP: SFP is a form factor for a compact and hot-pluggable optical transceiver used for data communication and telecommunication applications. It is commonly used in networking equipment, such as switches, routers, and network interface cards, to provide a variety of connectivity options, including fiber optic and copper connections. 

Ethernet: Ethernet, on the other hand, is a set of standards defining the physical and data link layers of the OSI model for wired local area network (LAN) communication. It includes specifications for the cables, connectors, and protocols used to transmit data over a network.

In many networking scenarios, SFP modules are used in conjunction with Ethernet protocols. For example, a switch might have SFP ports for fiber optic connections, and these ports would still adhere to Ethernet standards for communication.

Therefore, the question of whether SFP is better than Ethernet is a bit like comparing apples to oranges. SFP is a form factor for optical transceivers, and Ethernet is a set of standards for network communication. In practice, SFP and Ethernet often work together to provide flexible and high-speed connectivity options in modern networking environments.

If you have a specific aspect or use case in mind, please provide more details, and I'll do my best to address your question accordingly.