Gaga's choreography in Born this way is really simple and easy to pick up. Britney's choreography in Circus was more challenging and intense in comparison to Born this way. I voted for Circus but I would have voted for Judas had that been the option.
Gaga started really getting with her choreography, near the end of the BTW era. I remember when she started and she was a bit off beat with her dancing and the BTW choreography wasn't great.
Britney's "Circus" era choreography was sharp and in sync and etc.