I believe the prices are the same. But the app has a number of "games" to collect tokens that get credited as discounts. Seems to be mostly stuff designed to get you to open the app daily and browse their offers. Which might be "innocent" if it's just to get you to buy more stuff, or maybe they have more reasons they want you to have the app open. Who knows

At least Aliexpress doesn't have all the fake slot machine type games that temu has that always end in variations of "get $200 of discounts for your next order if you order x items from this list"