Thanks to something called the avalanche effect, even the slightest change in input results in a totally different output.

21232f297a57a5a743894a0e4a801fc3 is admin's hash, what about admin1?

e00cf25ad42683b3df678c61f42c6bda21232f297a57a5a743894a0e4a801fc7

Good spot! Even a one letter change means the resulting hash will be unrecognizable from the original.

That looks pretty similar to the original, not much of an avalanche there right?