only thing the swift really has going for it is the assisted opening, while not bad, the addition of the thumb plates on many of the other designs render this addition obsolete IMHO as you would have to draw the knife then open it....albeit it opens very quickly, but its still 2 actions in a high stress situation.... the thumb plate makes the knife open on the draw, thus removing one of the steps needed before deployment as a self defense tool...
Personally, I'd look for something as a self defense knife intimidating enough to win the fight before the first cut was made.... the instant open and size advantage afforded by either the Espada Large or Talwar XL make them my favorites for EDC knife defense, with the 5.5 inch Talwar XL full serrated being by prime choice due to aggressive size and profile.....it should be a game ender before the game begins if you follow me.....with 5.5 inch being max legal carry length in my state, IMHO it's the almost perfect EDC SD knife....
YMMV.... and check your local blade length laws...the entire post becomes moot if you are stuck using a 3.5 inch blade legally.