They both offer the similar benefits, but Bromide is enhanced with Bladderwrack, which is another algae that helps boost the benefits (digestion, heart health, weight loss).
Bromide Capsules take time for the body to break down the actual capsules, it's a delayed process. You may take them in the morning and not feel the effects until many hours later, if at all. The Bladderwrack enhances the Sea Moss, so it's a compound that was created to be stronger than just Sea Moss alone. More minerals, more antioxidants, more detox benefits, and an overall stronger diuretic.
The gel can start working a little faster, as you are consuming it in raw form. The Sea Moss Gel is only made with the Sea Moss Algae, so you only get the benefits of Sea Moss. It is still rich in minerals, antioxidants, and detoxing benefits. If you are consuming it straight from the jar you do feel the effects pretty fast.