Krav Maga by design is more geared toward the threats you're likely to encounter on the street. That being said, skilled Western boxers and Thai boxers can dish out a vicious beatings compared to the average brawler or purse snatcher on the street. Boxing and Thai boxing require a greater commitment to training and diet compared to Krav Maga. Boxing and Thai boxing allow you to clobber the heck out of people, but they don't feature as much ground fighting as most Krav Maga systems being taught today. Kappap, the Israeli sister-style to Krav Maga, has heavily incorporated BJJ into its curriculum. It's up to you as to what you want out of a fighting system and how much of your time you want to give up to be successful in a particular style. If you decided to box or Thai box first, this would certainly help you if you decided to transition into Krav Maga at a later time.
.44 magnum trumps all,
But I would pick krav maga. The other three are incomplete sports, ill suited to self defense. A wrestler who can take a punch, will twist the other sport fighters into soft pretzels, once he slips inside the guard.
Probably Krav Maga, but a lot is going to depend on the practitioner and the person teaching the techniques.
also which is better for Street defense?
