The document compares four PLC models: LX3V, LX3VP, LX3VE, and LX3VM. LX3VP adds N:N networking and improves pulse output frequency and ladder capacity over LX3V. LX3VE expands on LX3VP with additions like S-type acceleration/deceleration, jitter pulse support, and E-CAM functions. LX3VM is similar to LX3VE but also includes circle interpolation functionality.