Was the revolution that Old Major started on Animal Farm the same revolution at the end of the story?

No it certainly wasn't. By the end of the story the animals had simply traded their human oppressor for an animal oppressor (Napoleon). Really Napoleon is much worse that farmer Jones. At least, with farmer Jones, the animals shared a similar experience. Now the animals are simply divided and terrified.

"Somehow it seemed as though the farm had grown richer without making the animals themselves any richer-except, of course, for the pigs and the dogs....As for the others, their life, so far as they knew, was as it had always been. They were generally hungry, they slept on straw, they drank from the pool, they laboured in the fields; in winter they were troubled by the cold, and in summer by the flies." (Chapter 10)