Why are they both bad? Seriously, what makes them so terrible? I'd love a solid answer with examples if possible. No disrespect intended, but I use Adv Task Manager and its great. The options are awesome.
Fair enough.
Task managers have this "auto-kill" stuff that is pretty horrible. It'll strike down any application unless you tell it otherwise. It also lets you pick what ones you want to kill.
Thats the problem, it doesn't manage the programs, it stops them and forcefully closes them.
Most users don't know what tasks and apps are necessary for certain parts of their android phones, so they just go "hmmm, that one is hogging resources, KILL" and now their phone wont sync to their servers, or their alarm wont go off, or the market is not updating.
Android already has a system in place to shut down/suspend/re-open programs. That system decides what to do for the best performance possible, and when you take the control out of its hands and start putting it into 3rd party software, it gets bad.
Here is an example, go to your task manager on your windows PC. See lots and lots of programs?
If there was a "ATK" for windows, it'd go through and start killing off things just as it does with your android.
Now if you did that on windows, you'd crash the system, I'd promise you that. Certain things need to run to keep the ship afloat.
Same thing goes with Android. It runs more smoothly and efficiently WITHOUT a task manager.
Google doesn't have billions and billions of dollars and some of the best programmers in the world to not properly build an operating system.
I promise you, most of the people who say "WHOA my phone is faster!" are just getting a placebo effect. Their system isn't running any faster, they just perceive it as so.
So in short, Android OS already manages the programs in the best way possible. Something that a task manager would interfere with, 'causing issues.
And to answer someone else's question as to of why VZW tells you to install one on your phone. Its rather simple, they're morons! They are the same people that don't know VZW is CDMA, or what LTE is, or even what half their phones are.