I have a Marmot Oracle with Precip+. I also have a showers pass elite. There isnt much comparason. The marmot is not a cycling cut, so its bulky, the hood doesnt remove, and it gets clammy inside, from sweat buildup.
The Marmot was good for stuff other than cycling, which the showerspass isnt as good as from its lack of pockets, short cut in waist for being bent over a bike, etc.
The biggest difference between the two other than cyclign specific fit, is that my base layers are not soaked in sweat after an hours ride in the showerspass one.
Both are meant for hard pouring rain. If its not raining, i have prefer other jackets like softshell for winter commuting instead of either.