General information looks like this:
The main leaders are GameGuardian (GG), GameHacker (GH), GameKiller (GK), GameCIH (GC) and CheatEngine (CE). Everything else is a rarities that few people use, or they are poorly-functional.
Now, for each program individually: GameCIH - grandparent. Rustic, many can not. Access rue curve, so in most cases it does not work in modern devices. At 5 android above does not work in principle. CheatEngine - perhaps more able, but no one knows how to use it. Instructions and information is not enough. Chances are great opportunities, but the interface disappoint as convenience. In total, the program is little used. GameHacker - very useful for the beginner, providing a balance between complexity and capabilities. On 5 android does not work. There are special. version for x86 devices. The rich functionality and user-friendly interface. Unfortunately, the abandoned, and further development is not expected. GameKiller - probably the most well-known program. Powered by Android-5, albeit crooked. Maybe more it complicated for a beginner. On the whole, quite convenient and functional tool, but sometimes there are bugs and problems. Develops, although rather slow, mainly support and cosmetics. GameGuardian - increasingly popular tool. Not so long ago was among the outsiders, it is now slowly breaks in the first place. The program is rich in functionality and works steadily almost everywhere. However, the interface does not differ convenience, the main emphasis is on functionality. Only actively developing the utility of the number represented. There is strong support.
The main functions of the program about the same. That means that if something could be done in one program, it is likely, this could be done in any other.
However, this does not apply to some unique features not found in other utilities.
By the way, the opposite is true. If something can not be done with a single program, it is likely that this can be done, and others, although there are exceptions.
Now with regard to the selection. If you have an android below 5 and ARM processor, you can use any option.
Availability of x86 processor narrows the choice to GameHacker or GameGuardian.
A 5 android and above - CheatEngine, GameKiller, GameGuardian.
If you have 5 Android and x86 processor, then there is no choice - GameGuardian.
Intel and x86 processor are one and the same, if anyone not knows.
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added 3 minutes later
Some user recorded video - breaking test of the same application through GameGuardian and GameHacker:
Test results:
GameGuardian hacked value without problems, and GameHacker could not find it.
Perhaps in GameHacker should change the settings, exposing a deeper search - I do not know.
But with the settings of "out of the box", GameGuardian coped with the task, in contrast to his Chinese counterpart.
By the way, in the video also shows that GH is looking slower than the GG, and this despite the fact that GH finds nothing.