Around six years compared to maybe 3. They dont wear there bodies out so fast from laying eggs every day.Egg production will be a little less with heritage. The biggest difference between heritage and production is feed-to-egg conversion. Productions are smaller, eat less, and lay sooner, and lay more frequently. Heritage birds mature a bit slower, and eat more due to their larger dual-purpose bodies. If I remember correctly, the productions will yield more eggs over a short term (couple of years or so), while heritage will yield eggs over a longer period of time.