Those meteors were of much smaller scale than the ones created in the recent chapters.
Not only that, but a singular meteor would have killed Gaara, Naruto, the Tsuchikage, and hundreds of ninja if it weren't for the Tsuchikage's ability to drastically decrease the weight of rock.
As a third point, Madara isn't just dropping two here. He's dropping dozens of Chibaku Tensei on Aizen, here. And considering these Chibaku Tensei are far larger than Pain's per Naruto, Aizen won't be able to wipe them out with his sword. I mean, Ichigo wiping out that immensely smaller mountain with his blade was an indicator of his superiority to Aizen. How is Aizen going to deal with dozens of meteors that are at least over five times that size?
Not only that, but none of Aizen's energy-based attacks would have any effects on Madara anyhow, considering he can absorb them with the Rinnegan. And again, Aizen can't even sense Madara on the Limbo dimension, so how is he supposed to counter?