Is it the same snack as roti sai mai?
No. Roti sai mai is an Ayutthaya snack of thin roti wrapped around spun sugar. Here we introduce street roti, griddled dough with sweet sauce.
Thai Roti · โรตี
If you want something sweet from a street stall, try roti. A thinly stretched dough is cooked on a griddle and served with sweet sauces such as condensed milk or chocolate. Some menus add banana, so it is a good pick when you want fruit and a snack together. If the roti is cut up for you, share it piece by piece while it is warm.

You enjoy the thinly cooked dough together with the sweet sauce. The crispness at the edges and the softness inside change with the filling and how it is cooked. In versions with banana you can taste the sweetness of the fruit too.
Banana and sauce differ with the menu you order. Choose the topping you want first.
Roti in Thailand is also met as a sweet street snack. Ayutthaya’s roti sai mai is thin roti wrapped around spun sugar, and it is eaten differently from the griddled roti introduced here. Try both and you find different snacks under the one name, roti.
No. Roti sai mai is an Ayutthaya snack of thin roti wrapped around spun sugar. Here we introduce street roti, griddled dough with sweet sauce.
You need to ask about the ingredients in the dough, the toppings and the sauce. Even on a menu without egg, there may be an ingredient you avoid in the dough or the condensed milk.
If you would like to read more about the food and the regions behind it, these sources are worth a look. Ingredients and cooking methods can vary from one cook to the next.
Sharing image credit: แอนเดอร์สัน · CC BY-SA 4.0