It's actually quite fascinating to look at the podium here, of course all three have good qualities and weaknesses overall but the way I see it, their best qualities are:
Sakamoto Kaori - Mostly consistent jumps with power and speed
Kihira Rika - Them 3As (and other jumps are good as well)
Miyahara Satoko - Artistry combined with skating skills
So consistency>tech>artistry. (Of course Sakamoto Kaori and Kihira Rika have artistry and skating skills too, and Miyahara Satoko is usually consistent, I'm just putting things simple here.)