Every pussy is just slightly different from the other. The hood, the way the inner and outer lips are shaped and the way the fit with each other. The taste of her juices, the amount of juice she oozes when aroused, the way she squirts or gushes or just oozes. The way her pussy smells when she is aroused.
But one thing is always true - Every pussy is beautiful and if all I did every day was to look at and lick every pussy on this planet, I think it would be a wonderful life :-)