I am a partner in a food catering company. We have two separate kitchens under different names, one halal and one haram. The haram kitchen is consistently doing better. But we still keep the halal one around because we want to capture a larger market share and it is still operating at a profit, though much smaller than the haram kitchen.
The general global trend is that halal tends to be doing worse, be it locally in the food and business, or globally in terms of crime and military conflict and poverty, where trouble is generally synonymous with muslim and halal.