These seem to be 5050 LEDs which are larger compared to the cheapre 3528 LEDs. See https://www.flexfireleds.com/pages/Comparison-between-3528-LEDs-and-5050-LEDs.html
They are stated as waterproof and also so seem to have self adhesive backs. As a bonus they come with Remote Control Box that plugs between the 12V power supply and the LED strip (so you don't need to buy the connector for converting your 12V power supply to screwable contacts) and also a remote control to change colour. Seems like a steal of a deal.