As a previous Frogg Toggs user (primarily for waterfowl hunting), I purchased and used a Sitka this past season... The level of superiority is not even describable...
The zippers on the Frogg Toggs are very fragile, and the jacket itself will tear by looking at it wrong... They did keep me relatively dry, but I was bone dry after wearing my Sitka in a pretty good rain... I went back to my shack to change out of the wet clothes, when I realized it was not necessary....