What is better, memory foam or pocket springs?

The best choice depends on your sleeping style. Pocket springs win on ventilation and freedom of movement; natural latex mattress wins on pressure relief at sensitive pressure points. 

• Sleeping hot or moving a lot -> pocket springs
• Sensitive shoulders/hips -> Natural latex mattress or natural latex comfort layer
• The Tuur® Spring Mattress combines the best of both: pocket spring core + natural latex comfort