

Tartine's recipes in this respect are more sustainable. Forkish argues in his videos that complement his book that the remaining starter is 'spent fuel'. In his levain recipes, he usually asks you to build 500gr of levain, and you only use 200gr of it for example. On the other hand, Forkish wastes ALOT of sourdough starter when building his sourdough. I find one of Tartine's weaknesses is the lack of instruction when building a sourdough starter. In terms of sourdough starter prep, both books are on the opposite side of the spectrum. FWSY on the other hand starts off with basic loaves, and teaches in a step by step fashion, firstly starting off with yeasted loaves, then going into hybrid loaves whereby yeast and sourdough are used together, then doing advanced levain loaves.

I personally started off with Tartine Bread on my sourdough journey but had previous bread baking experience.

Tartine Bread is directed towards sourdough specifically and wouldn't really be considered a beginners book for bread baking. I believe both books have their strengths and weaknesses and complement each other well. I own both books and have a vast library of bread baking books.
