Having owned both, I actually quite like the Performance Line over the CX, or at least for when riding in the UK.
The main reason being that the Performance Line is certainly more frugal in respect of draining the battery, and achieving range. Any short fall in NM can reasonably be compensated for with gearing. Having said that, it has been a very long time since having ridden a bike with the Performance Line motor, so I might well feel differently if I were to now try a bike that is fitted with the drive unit, but I doubt it.
Much is spouted about NM, but certainly for my use, it isn't an issue.
It would be if I were riding in the Alps more than two weeks of the year that I currently do, where you could be taking on 1,600ft of elevation gain over just 1.5 miles, but for the bulk of the year in the UK where my average elevation is just 1,200ft per 10 miles, it is no big deal.
I'm afraid that I can't help in respect of the dormant battery though.
