Hello surfer boy
First about the price: It is the supplier on Galaxus who determines the price if it is not Galaxus itself. In this case it is OPO Oeschger. It's probably a Swiss specialist shop, for which these prices are not unusual - the average is 263.- for the solo machine. Of course, if you know what you need, you can get a much better price online. The link you sent from the 85 was simply from a supplier on galaxus that offers a lower price for the solo machine. Here, for example, you have the 110c for 15.- more than the 85 you linked to Bosch Professional Impact Drill GSB 18V-110 C.
Just find the right supplier ;)
Otherwise go to Immer AG or another specialist shop and ask what an 18v 4ah costs, then go to a DIY shop of your choice and ask what the same battery costs.
Now to the machine: As you have already correctly mentioned, this is the same machine, it has been renamed for marketing purposes to bring it into line with the competition. In concrete terms, this means that the name no longer refers to the torque in the case of hard screwing, but to the maximum torque, which is 110 nm. The competition also states the maximum torque, so it sounds like a bit more.
Hope could be helpful
Yes, it fits. There is also room in the insert for a second ProCore 18V 8Ah and the charger. The accessory compartment could also be used for a third battery, but the battery has a bit of play in there - a ProCore 18V 12Ah would also fit in here, but it would be relatively heavy.
The manufacturer states the following:
Compatible since 2008: All our batteries fit within the respective volt class in the new and the already existing Bosch Professional tools.
I had to look at it more than once and took a few minutes to find out from Bosch that I was spelling it correctly (B is not = R).
Something is wrong here anyway, because there is no GSB 18 V-110 C. Only the GSR 18 V-110 C exists. There is only the GSR 18 V-110 C, which in turn has the Bluetooth module. I hope this helps you.