Just going to mention here and not in the thread that (though I did mention Pignite) I'm mostly not talking about their evolutions because my challenge does not allow me to evolve Oshawott or Snivy. nor can Oshawott learn either of the moves you said lmao. That said my opinions are really based on experience and not really competitively or anything.
... That and Oshawott can't seem to take out Excadrills or even Boldores as easily as Snivy can. :v