Red potatoes and brown potatoes (such as Russet potatoes) have different flavors and textures, which can affect the taste of French fries made from them.
Red potatoes tend to be waxy and have a creamier texture. They are generally less starchy than brown potatoes, which can result in fries that are moister and less crispy.
Brown potatoes (Russets), on the other hand, are starchy and have a drier texture, which makes them ideal for frying. They typically produce fries that are crispy on the outside and fluffy on the inside.
So, while both can be used to make French fries, the taste and texture will vary. Generally, fries made from brown potatoes are preferred for their crispiness and texture, while red potato fries may have a different, softer mouthfeel.