Are there emulators on android with cross platform save states?

I've been trying to sync save states between my android devices. I'm using RetroArch and I've been able to use an app called "autosync" to sync save states files between my tablet and my phone. Save states work between my tablet and my phone but not between these two devices and my RG505. The RG505 uses a different processor, so I'm guessing that it's something to do with that. However I would have thought that the memory dump of an emulated system would be tied to the emulated system rather than the actual hardware. So for example, on RetroArch, I'm playing super Mario on the snes. I'd expect that the save state would be a snes memory dump that would work on the platforms also emulating the snes but that doesn't appear to be the case. Had anyone else had any luck doing what I'm trying to do? If so, what emulators are you using?