Yeah, now the Electros and SKs are direct competitors, while before I used to consider them in different leagues (monotimbrality was a big difference IMHO).
Both are lightweight, organ-piano-samples keyboards intended for general stage use without the complication, weight and cost of workstations.
For a complete analysis we'll have to wait for the actual release of the Electro 5, to discover all its detailed specs and quirks.
Generally speaking the Hammond is, quite understandably, more geared towards tonewheel emulation. While the organ and leslie sound quality may be subjective, it is no question that the SK offers more options and tweakability. It also offers a waterfall keyboard on all of its models (not even mentioning the double-manual version, which Nord is totally missing).
Nord is probably slightly better as a general-purpose keyboard for players using more piano than organ, as it also offers the HP piano-like action which is far better for APs and EPs. Its organ is nonetheless very strong (and it has now the ability to mount the half-moon switch, which the SK1 lacks), but it's far less customizable than the Hammond. Conversely, Nord's offer of samples and especially pianos is hard to beat.
As for other non-sound features, Nord's build quality is regarded as superior (but to be true I have no direct experience of the SK line, and anyway there are thousands of satisfied H-S users out there, so reliability is not a major issue), but I find the main advantage of Nord is it's user friendliness and ease of use.
However, the Electro 5 is a big change in this respect: for the first time in Electro history we have a real screen with menus etc, so we may have lost some of the familiar immediacy of control.
We'll have to check this out when the 5 is available (anyway I wouldn't worry too much as the Nord Piano, Stage etc all have screens and menus but still are quick and intuitive to use)
Finally, is all this worth 350€ more?
Unfortunately, no answer here, only you can decide that...
