I generally catch alot more rainbows than browns. although from my experience there are a few things you can do to increase your brown strikes, for example, browns seem to be alot more aggresive than rainbows and therefore i assume using large rainbow and browntrout streamers would increas the amount of browns you catch. also from my limited experience, i find i catch alot more brown trout in the evening, and rainbows tend to be caught all day. hope this helps but i'm nowhere near an expert lol