The DSR is too close in price to the full DSR/X to be compelling, IMO, but the downgrades also seem fairly mild compared to the X so maybe some people will go for it. It has the same problem as the SR, SR/F, and SR/S for me, which is that the $20k+ price puts it in range of Energica's US pricing for its CCS-equipped 21.5 and 22.5 kWh models.
Looking at the UK site the DS is £16.2k and the DSR is £17k, so basically no point in the DS unless you're stuck on an A1 licence. The DSR/X is £21k. The old DS made sense compared to the DSR as it could be much lighter with the 7.2 battery and I'm pretty sure it was a decent amount cheaper, like £2k at least. I certainly wouldn't replace my old DS with a new one. An S as a second longer range bike though might have been tempting, but again an older S is lighter and a lot cheaper and with the money saved slap a charge thank on it and charge twice as fast.
One curious thing I do notice in the specs of the Euro S and DS, the sustained speed is now down to 65mph (I think it was 70 before, maybe 75). That would definitely rule either of them out for me, the main reason I'd want either is for those longer journeys which would be on motorways and I wouldn't want to be on a bike that couldn't even hold the speed limit (nor pay £16k for the pleasure).
And what is the difference between the 75-10 (on the street models) and 75-10X on the DSR and DSRX?
I thought it may have been down to the wider belt, with a wider pulley and perhaps a longer shaft, however the DS has the wider belt but a non-X motor. It looks like it may be their designation for the "torque optimised" motors.