First find how many calories per hour Brandon gets from squirrels: 300 calories/squirrel * 6 squirrels = <<300*6=1800>>1800 calories
Then find how many calories per hour Brandon gets from rabbits: 800 calories/rabbit * 2 rabbits = 1600 calories
Then subtract the number of calories per hour from rabbits from the number from squirrels to find the difference: 1800 calories - 1600 calories = <<1800-1600=200>>200 calories
#### 200