Question on yeast quality?

I'm about to buy some ingreadients for a bread recipe which calls for quick yeast. I looked up some info and basically it looks like quick yeast is instant yeast, so first off if I could get a varification on that, that would be great. But assuming they are the same leads me to my actual question. I'm looking at two yeast products to buy, both look like their from France. One is almost two and a half time more expensive, but the more expensive one is the exact same product used in the recipe. So I'm wondering does it make a difference? Here are the two products:
Best Answer
Yes, quick yeast and instant yeast are the same thing. It doesn't have to be proofed in warm water before being mixed into the dough.
SAF instant yeast is a good product, so personally, I wouldn't spend so much more for a specialty brand. Both brands contain yeast and an emulsifier, and SAF also contains ascorbic acid (which acts as a dough conditioner).
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How can you tell yeast quality?
InstructionsAre there different qualities of yeast?
There are three main types of commercially produced baker's yeast: active dry, instant, and fresh. All of them will work to leaven doughs in any given yeasted baking recipe, but each has slightly different properties, and, for the more discerning palate, varying flavors.What is the highest quality yeast?
SAF Red is your best choice for all-around baking, from sandwich loaves to crusty no-knead bread to freeze-and-bake dinner rolls.How does yeast affect the quality of bread?
Yeast strengthens bread dough In bread making, we want to develop as much gluten as we can because it strengthens the dough and holds in gases that will make the bread rise. Once flour and water are mixed together, any further working of the dough encourages more gluten to form.The Quality Control for AEB Oenological Yeasts
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