I have both Navionics (platinum card) and LakeMaster cards, one in an 1197 and the other in an 1198. They both have pluses an minuses, LakeMaster show depths in some areas on my lake that Navionics leaves blank (just an outline of the area). LakeMaster allows me to highlight depth ranges that I want to fish. Navionics has better detail in some area. Personally I like have the two different cards and cannot say which one is better, it depends on how you will be using them.
George