That didnt even harm ems madara when he was alive. In fact madara ran head on into it, which he didnt have to do. Madara didnt drop any meteors or use CT. Not to mention he was unable to use limbo or just didnt use it.
Madara didn't get hit head on by it though, its fists had been mostly destroyed already, and Hashirama hadn't made up his mind
to kill Madara yet either so it's possible he didn't try smacking Madara down on purpose.
I don't know about Edo Madara's CT strength, but the meteors he dropped down have already been shown to be smaller than
his PS dramatically, and one of the meteors couldn't even kill Ohnoki despite Ohnoki getting hit directly. Shisuusenjuu, which
is larger and stronger than PS and can pick up Kurama should be able to catch those meteors no problem. And any calculations
about its supposed power doesn't work because we have already seen how limited the power of those meteors were as Kishi
clearly doesn't use real world physics to judge how powerful certain attacks are.
That being said, SM Hashirama is also stronger than the Edo Hashirama that Madara stalemated. Since Obito doesn't have Kamui,
he's useless besides the bijuu he uses. Thus, Hashiarma ultimately very high diffs the duo. Probably going to be almost if not
as exhausted as he was in VOTE but still pulling out victorious.
He loses Scenario 2 though. Obito constantly messing him up and screwing with him will prevent him from properly
fighting back against Edo Madara also hitting hard and thus he'll eventually get captured by Kamui or smacked down
by PS.