As an avid hunter I can tell you it all depends on the style of bow. In a sitting position drawing a simple curve bow like the survival bow is no more difficult. It does however take more time to bring to full draw until you get used to the movements. It does also significantly increase accuracy as your body has multiple points of contact to the ground making you more steady.
Where this really shows is in compound bows. They have what is called a let off. Where the draw weight is significantly decreased by a pulley breaking a line of set tension. To the degree of a compound bow set at 130 pound draw weight will let off down to around 50 pounds.