Is it the same snack as roti sai mai?
No. Roti sai mai is an Ayutthaya snack of thin roti wrapped around sugar threads. Here we introduce street roti, cooked dough served with a sweet sauce.
Thai Roti · โรตี
If you feel like a sweet snack on the street, try roti. Thinly stretched dough is cooked and served with a sweet sauce such as condensed milk or chocolate. Some menus add banana, so it is a good choice when you want fruit and a snack together. If the roti is cut up for you, eat it piece by piece while it is warm.

You enjoy the thin cooked dough together with the taste of a sweet sauce. The crispness at the edges and the softness inside change with the filling and the way it is cooked. On a menu with banana, you can also feel the sweetness of the fruit.
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. Roti sai mai in Ayutthaya is thin roti wrapped around sugar threads, and it is eaten differently from the cooked roti introduced here. If you try both, you can enjoy different snacks under the same name, roti.
No. Roti sai mai is an Ayutthaya snack of thin roti wrapped around sugar threads. Here we introduce street roti, cooked dough served with a sweet sauce.
You need to ask about what goes into the dough, the toppings and the sauce together. Even on a menu without egg, the dough or the condensed milk may contain an ingredient you avoid.
If you want to read more about the food and the regions behind it, these sources are a good next step. Ingredients and cooking methods can differ from one place to the next.
Sharing image credit: แอนเดอร์สัน · CC BY-SA 4.0