In his little brawl with the alliance, he didn't say "it was too much" as in it was too much for him to handle. He said it because he was mocking Naruto for his attempt to land an attack on him because it was such an overkill attack. Why would Madara say that it's too much if he had the power to negate it all along? It doesn't make sense when you think about it that way. Also, the combined efforts of Onoki, Gaara, and Naruto is not to be taken lightly.With EMS hes stronger, but without it? Certainly not. He just slaughtered a couple of randoms, but was forced to use EMS rather quickly. Not to mention that even with that Naruto (base), Gaara, Onooki managed to overpower him. As he himself said, "it was too much". You cant really disregard it.
It still doesn't sway me from the rest of my post. In the end, it's my opinion that Sasuke wouldn't even scratch Madara. Perhaps I'm exaggerating it a bit, perhaps not. However, no offense, but there's nothing you can say to make me change my mind. I stand by my claim that Madara is leagues above Sasuke.
The gap in power from Itachi and Sasuke is likely the same parallel as the gap in power from Madara and Itachi. Sasuke was an Uchiha genius. Yeah, and so was Itachi, and so was Madara. That puts Madara on a different level from Sasuke. It really is that simple.
Even with his EMS it doesn't fill the vast gap in power. A dojutsu upgrade isn't going to make Sasuke stronger than Base Sharingan Madara. If the EMS was such a strong boost in power, then why isn't EMS Sasuke stronger than MS Itachi? It's because when it all boils down to it, it's about their overall stats and skills and that is where the difference is between Sasuke and Madara