No land-based casinos offer welcome bonuses and promotions unless on special events like Black Friday and birthday. On the contrary, bonuses are the main part of online casinos, and you can get Free Spins and Free Chip to play casino games.
Also, online casinos tend to offer less jackpot value than land-based casinos. This is something we can realize from top land-based casinos like in Macau or Las Vegas.
Lastly, online casinos are stricter in terms of age verification. Players are required to verify their age before playing at any virtual casino.