As noted on our page, it is still the 2018 model. The notebook is also adapted to the market price and the pricing is also influenced by supply and demand, as well as the different suppliers :)
The two 15" models are technically the same and actually only have the difference of the hard disk. However, the price is formed on the basis of our purchasing conditions and we can therefore currently offer the one with more memory at better conditions. Regarding the 13" model, I'm afraid I can't help you, as I don't see exactly which one you mean. The best thing to do is to contact our customer service directly. https://www.digitec.ch/de/information/contactInformation
Yes, we can organise this. You can contact our customer service by e-mail and enter the desired configuration. We will then check it. Please note that personalised orders cannot be returned and must be paid for in advance.