That depends on how you define "the same result". The assumed (in some cultures) moral superiority of the suicide bomber regardless of the legitimacy of the target can have considerable PR value. In a way that somewhat resembles a ponzi scheme, those at the very top may reap higher rewards, and so choose to elevate the tactic into a strategy.
More than one goal exists for each group, many of these goals are not mutually compatible, and different groups arrive at different mixes of tactics in pursuit of their goals and to resolve (or ignore) the various contradictions and incompatibilities in different ways, and these mixes change over time in reaction to a changing environment, including the S&T employed by other groups.
IOW, don't expect the strategies or tactics that groups use to settle on any sort of Nash equilibrium.
If you are talking about war, then no, that's not suicide. The aim is not to die, even though it might be likely.
Even suicide bombers don't have death as their primary aim - if they achieve the same result without dying, they would.