Hi. I will be visiting Berlin in a few weeks and on my return trip I plan to take a train from Berlin Hbf to the Berlin airport. I will have 2 suitcases with me. Is there much of a difference in convenience getting luggage onto a FEX train, a regional train, or an S-Bahn train? I'm 75, have shoulder issues, and struggle lifting things, particularly into overhead bins. So the easier the better for me. Does anyone have any experience on this or advice?
(And, while I'm at it, is there any advantage using either the DB app or the BVG app for buying tickets?)
Thanks!
Ron