Bryan, these species are similar in care, bicolour can tolerate a bit higher humidity, but need way bigger cages. You won't be able to find CB frogs, so if you are to get bicolour it is gonna be WC = more headache and possible medical problems, because of all that I would not consider it as a beginner frog. But there is nothing like holding one of these. Very very impressive frogs when they're happy and healthy ( see pics of Daniel frog in his other thread)
sauvagii are awesome, you can get cb baby, they can live in smaller cages and need lower humidity. I would suggest you go with these.