The EM0490 has been around for a little while, But the EM4820 and the EM2800 are definitely new.
Im guessing that the 4820 is a replacement for the 4800? I wonder what improvements theyve made to it? it appears theyve changed the switchgear somewhat, to enable it to heat up the thermoblock for steaming. and also given it a water switch, so you can use it for hot water.
I guess the EM2300 is no more, Rest well little Ristretto, You were a fine starter machine for many