Hello,
I have both the Bonefire and the everyday Witch. Both are RWS inspired and read very easily. Neither is dark.
I cannot talk for the Triple Goddess that I do not have.
The Everyday Witch I like for its lightness and sense of humour, and for the style of art and the way the characters are represented (funny witches of both gender, in pointy hats and striped pants, with many cats around). To me it is a nice change from the more conventionnal way witches are often represented these days, with floating robes and zen faces (I have nothing against that, I like it also ; I just welcome the change and the second degree humour of the pointy hat witch)
It is what I call a theme deck, and for that reason I would probably not choose it as my only deck if I had only one. The strong theme makes it great for readings when you are in the mood for young fun witches, but it is not a "generic" deck that will please all querents in all situations.
This deck reads very well, and, despite its general joyous illustrations, it can give a balanced reading, though it might lean a tad toward "optimistic" rather than purely neutral - but that depends also on the reader.
The cardstock is mediocre (not the worst, but certainly not very good - this deck I like "despite" its cardstock, not because of it like other decks). It is flimsly IMO, but some people will appreciate that because it will make it easier to riffle shuffle.
The Bonefire I love for the art, wich is beautiful in its own right. I have the mass marketed Schiffer edition.
It is a very balanced deck, that does not try to sugar coat the tough cards ; in that regard it might be more balanced than the Everyday Witch.
Despite the style of the art that is very stamped "tatoo-like", the deck itself is not themed, and in that sense it can more easily lend itself to all kind of situations and querents.
But, it is also very conventional in its interpretation (which is a good thing, just that I like diversity so I would not like to have only this deck to choose from). It is a "serious" deck, and despite the love I have for its art, it has happened in the past that I have found this deck just a tad slightly boring (sorry, boring is too strong a word....I do not know how to say that. What I mean is, this deck is very "reliable", wich of course is a good thing. But, sometimes I like an unexpected thrill....)
Also, the Bonefire cardstock is much thicker (I am only speaking for the Shiffer version here) than the Everyday Witches. The Bonefire cardstock is good but not the best (a little too shiny, not slippery enough) but it gives an impression of good quality, and at least it seems sturdy enough to stand the test of time (hopefully, because in that regard, cardstock can give you good or bad surprises). Cards are large and cardstock a little too thick for riffle shuffling with average hands, but that is very personal. I do not like to riffle shuffle my tarot decks, so I like this sturdy cardstock better than the flimsy kind.
Both decks do not show a lot of diversity when it comes to human representations.
I like that the Everyday Witch show witches of both genders, and I appreciate very much that the Bonefire occasionaly show same sex couples ; plus, in the Bonefire, you also see some variety in skin color (not much, but still)
But, both decks show characters that are young, thin, and conventionaly beautiful. It might be an issue for some people, or not at all for other people. Once again, it might also depend if that will be your only, main deck, or part of a wider collection.
If I were to choose only one deck between those two, the Bonefire would be my choice for its ability to cover most situations and moods. It is a more "serious" deck than the other one.
But I am glad that I have other decks in my collection and I am glad to have the Everyday Witch for its perky joyous humour.
I hope that helps you !