Sants or Passeig de Gracia for train to Flaca from Barcelona
 

My husband and I will be arriving at the airport in Barcelona and then taking a train north to Flaca. He has some mobility issues (mainly with stairs), so I thought it would be easiest to take a taxi to either Sants or Passeig de Gracia train station. I was leaning toward Passeig de Gracia thinking it would be smaller and easier to manage, but then I read something about going down stairs to enter the station? Would greatly appreciate any thoughts on which station would be easiest to manage. Thanks!

As I remember there may be some stairs inside the entrance to Sants. I know there are elevators down to some of the platforms.