Across the world, all sites operating in the field of online betting are certified through a license, hence there isn't one better or worse than the others - you just have to choose the one that best suits your needs.
All these bookmakers offer a fair welcome bonus, but they can differ on the odds; in fact, you may find a site that has better odds on football and another one on basketball for example. That's why the best one can be chosen only by the player according to his needs.  From the studies we have carried out, we can only ensure that all betting sites are reliable, safe and have excellent customer support.