Difference in energy level for workouts if i eliminate grains and eat only raw fruits and veggies, assuming getting same calories?

Possibly: Many people are sensitive to gluten gliadin or other chemicals in grains and would feel better/have more energy substituting raw fruits and veggies

Energy and diet: Suggest keeping a daily log of what you eat and amount/type of exercise. Apps making tracking easy. Include any weight changes. Discuss concerns with your pcp , with your log information, to make sure medical factors are not effecting your energy level. See: http://www.healthline.com/health/diet-and-weight-loss/top-iphone-android-apps#1. Hope this helps.