Hello, completely new to Accor Club forum

and I have to choose between three similar-looking mid-tier properties in Budapest next month: a Mercure, a Novotel and an Ibis.
All three are extremely close in location and pretty similar in price (the Ibis a little cheaper than the other two, as you might expect). Which is the better brand for a new non-status member, if any? I can live without breakfast but it would be nice to get wifi, somehow.
I'm SPG Platinum and IHG Platinum but it seems the Accor portfolio might be an attractive option for a mostly-leisure traveler like me. Should I bother signing up to Accor Club ... or is it not worth it unless I'm intending to become elite?
Thanks for your advice