They have a different texture and mouth feel and taste. Also roti (or rather chapati which is the type of roti most similar) is made with just flour and water and sometimes oil. No leavening or anything or salt. Chapati is also much more stretchy and robust.
![[Homemade] Flour Tortillas. Possibly the first, possibly the only, tortillas made with Bordier butter.](https://lemmy.world/pictrs/image/2484ce11-51ee-4131-96ed-47c5c0633811.jpeg){kind=link}
I only had roti in India and all I remember is saying “this is a tortilla” to my coworkers there.
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They have a different texture and mouth feel and taste. Also roti (or rather chapati which is the type of roti most similar) is made with just flour and water and sometimes oil. No leavening or anything or salt. Chapati is also much more stretchy and robust.