I find it ironic that at higher levels effects that last until the end of your next turn seem stronger than save ends effects, simply because there are a lot of ways to get immediate saves and high levels.
They are, in many ways, stronger. Not simply because of immediate saves, but also the fact that when you look at the way rounds last, assuming they make their saving throw, "until the end of your next turn" is longer than "save ends" which translates to "Until the end of your target's next turn."
Putting that in initiative order:
You
Badguy
Ally 1
Ally 2
You only can benefit from the effect for the remaining amount of your turn. In most cases that means to take advantage of the effect, you need to use an action point.
In this initiative order:
You
Ally 1
Ally 2
Badguy
Your allies get to take advantage of the effect, but you do not without an action point.
But when you have a "until the end of your next turn" effect, you're always letting all of your allies and yourself take advantage of the effect at least once.
(Disclaimer, by "benefiting from the effect, I assume it's granting combat advantage or some other thing that while the target is under the effect of it, attacks against it are stronger. Things such as stun, still can be useful in removing turns, even if no one wants to take advantage of the combat advantage granted by it)