Which is more comfortable, posterior or anterior uterus

Anterior and posterior uterine positions are generally not felt by women, so there is no talk of comfort.
Anterior and posterior uterus refers to the position of the uterus in relation to the longitudinal axis of the body. Anterior uterus is when the body of the uterus is oriented towards the pubic bone and posterior uterus is when the body of the uterus is oriented towards the sacrum, both of which are normal uterine positions.
Normally, the uterus is located in the pelvic cavity, and a normal-sized uterus cannot be felt in the abdomen and is not felt by the woman regardless of its position. The position of the uterus is usually known during gynecological examinations and ultrasounds.
The position of the uterus is not static. The uterus has a certain degree of mobility in the pelvic cavity, and sometimes the anterior position can change to posterior. Sometimes the anterior position will change to the posterior position, and the posterior position will change to the anterior position. Consult your doctor for details.