The Business Gold has a 20K higher sign-up bonus than Edge, but the annual fee is $100 more. The Business Gold also earns a straight 1 point per $ spent, whereas the Edge earns 3x on office supplies & electronics, rides & gas, eats & drinks. They both have ongoing monthly or quarterly bonuses, although the Business Gold requires a much higher spend to hit them. See my post here for a comparison: American Express Referral Offers (Read Wiki before posting).