By obtaining ems i assume u have gained indra power. Therefore i would assume their equal. Now hashi has the same power as the shinju. I say he was equal to ashura. Thing is we dont know indras and ashura real power.
Indra did not have ems so no, you don't gain Indra's power that way. Indra's ocular power were closer to his father if anything and he had Perfect Susanoo without even having a brother gain Ems. And he had Six path power, so he was basically like Dms kakashi without kamui power.
Ashura had life energy cloak like Naruto, which Hashirama did not have. Just Bm naruto's cloak alone was disrupting all of Hashirama's jutsus, so if it was ashura with all those massive Tsb on his avatar neck then for sure its a complete sweep.
They are nowhere equal in power, Hashirama and Madara vote can't even transmigrate their chakra to centuries of people let alone practice the scale of their jutsus. And from what Obito's showed with his little Six path power chakra he was only able to transmigrate Kakashi for a short while which is nowhere near Indra and Ashura's level.