Is there a difference between an HDMI splitter and HDMI switch?

Whether you need an HDMI splitter or an HDMI switch depends on if you want to connect your device to multiple TVs, or ...

This is when you need an HDMI switch, a splitter, or both

A splitter allows a single peripheral to output to multiple displays.
Ars Technica

HDMI cable won't get signal through splitter. What features do I need?

I have a PC based on an ASUS TUF 450 mb with a Radeon cpu. I run a cable off the mb HDMI output to a splitter, one cable going to a flat screen, the other to an Epson projector. Works fine, but the ...