Unless you opt for a very low tension 'rockabilly' type steel string, other steel strings, even Spiro Weichs or Spiro solos (tuned down to EADG), are still 'harder' and more tiresome to play compared with a bass guitar. If you do want something easy on the fingers which requires less effort, soft nylon strings or similar are the way forward.
The benefit as outlined above is that a nylon or hybrid type string is more likely to give you an approximation of an acoustic double bass type thump, if that's what you're looking for.
I've spent a small fortune in the past experimenting with different strings on an eub and it always sounded like a fretless bass guitar, when strung with light gauge or soft steel strings. To get a warmer sound with a bit of thump requires a hybrid, nylon, or rubber type string.
Keep your eyes on the for sale sections as cheap strings come up regularly, if you do want to experiment.
Just my experience.