Hudes and Dreaming Way are both watercolour decks.
Hudes has a bit heavier hand (sometimes it looks more like diluted gouache than aquarelle and she also uses marbled paper and other materials), but the artist of
Dreamaing Way works with a very light hand and the transparent washes over gentle pen drawings are beautiful.
Nakisha's decks are painted in watercolours - just beautiful. She uses no contours and lets the washes do their thing without too much interference. I love these free spots of colour and water.
Brian Williams work with pen and watercolour washes. His style is more neo-Classical with a strong linear quality.
Harmonious Tarot uses a similar technique, a linear drawing and very light washes, and so does
Lo Scarabeo - very skillful and maybe most professional of the three, but also a bit cartoonish at times. The artist has wonderful control over her medium, maybe a bit too much - I personally prefer the less controlled and more expressive style of Nakisha.