The increase in battery capacity was from 2016 to 2017, and it corresponded to an increase in price of about 300 Euros. For the 2018 model the price again jumped by about 400 Euros, with an equivalent battery size to 2017. The equipment is equally on parity between the 2017 and 2018 models. Same frame, same drive, same shocks, same rims, same tires, same battery, same brakes, same fender, same kickstand, same lights, same saddle, same derailleur system... Only visible difference: the paint job is different.
A lot of dealers loved the old price (even the 2017 price). A moderately priced Speed Pedelec always sells well, at least in Switzerland and Germany where the laws are favorable to this category.