There are different types of gamblers depending on what they play. Some gamblers are rounded and play all kinds of types possible but there are those who only stick with one type.
For example, one could just play slots while one just sports betting. My question would be which one do you think is more addicting? Slot machines are more rapid and you can play it more consecutively because it is fast unlike sports betting where matches take time. You might get addicted on sports betting more if you enjoy analyzing things and winning it might give you some pride for your skills. Not to mention that if you are a fan of the sport you are betting on, surely you are emotionally invested in the sport therefore would want to follow it and bet on it many times.
Now, what is more addicting? Slots or sports betting?
Both of this type of gambling games are equally addictive for those who allow themselves to get addicted to gambling, I don't know about any other person but personally, I believe that addiction to a game doesn't come from the game itself but from the person who is playing it, getting addicted to any type of game in gambling depends on the how the player is able to control him or herself, different gamblers have different levels of self control and this is just the basic fact.
So, let's just say that some people enjoy playing slot while others enjoy betting on sports, those who enjoy betting on sports will easily get addicted to sports if they lack proper self control, while those who love playing slot games will easily get addicted to the slot game they play if they lack proper self control.