I see some confusion, both here and with the other thread, over just what the electrical differences mean.
Some of the differences are apparent; others are subtle.
The difference between 230V "Euro" and 240V "US" is big in theory, but makes no difference in practice.
Does the frequency matter? Now things get less certain. Pure loads (heating coils) really won't care, while motors will be greatly affected. Electronics? Probably not; most things power their electronics with an internally created DC current.
For all practical purposes, there is no way for an electrician to change the frequency from 60hz.
There's more to this than the plug pattern suggests. Euro residences typically have the entire service on what can be best described as a 30mA GFCI (RCD). Branch circuits are also often fused to 10 amps. Will your appliance trip a 5mA GFCI breaker? Probably not - but I don't know for sure.
As a dedicated circuit, you will want the over-current protection sized as close to the load as possible. Since you'll almost certainly be using a 20A, 240V GFI breaker, this means you'll want additional fusing in the circuit.
Finally, Euro-style coffeemakers very often do not have automatic shut-off, and need to be deliberately unplugged
after the water boils. Many Shuko receptacles have integral switches for this reason. Leave it on and you melt the element.
