Two types of dog: who's the smarter or braver?

 The video says it all:

Comment: it seems to me that the dog who crossed the stream in the water is braver/bolder but less smart than the dog who finds the more elegant and safer route which took longer.

There are other issues. The stream-crossing dog may have been unaware of the bridge while the bridge taker knew about it.

Neither followed their leader/caregiver and used the fallen tree. Why, I wonder? Maybe it looked unsafe. The dog has an instinct to make these decisions.