Hello, I have never used the Sea & Sea, however do have a few friends who use them professionally. I love the Inon and glad I made that choice. I really can not advise as can not compare, but yes the Inon is great! You could always ask one of the good camera stores (Backscatter and Bluewater Photo Store are very helpful) for some more professional advise, and of course depending which camera you are shooting with. Good luck!