Id recommend using batch node when ever you can!
Our game is coming from iOS to android as well, at least on iOS, our game came from an average of 35/45 fps to full 60 fps just from using batch node, we have at least more then 60/90 sprites and we use 4 spritesheets, 1024x2048, 1024x1024, 2048x2048, 1024x2028, and as you can see, we are using way too much memory just by loading this textures, but we managed to pack all of our sprites to their respective spritesheet images and reduce the memory size by using 4444 bits textures. And when they were grouped together (using parallax + few batch nodes) we had a huge performance boost!
If your game does not use a lot of draw calls or you are just testing it out, then there is a chance that you wont fell a difference. But when things start to get big, you should optimize whenever you can.
Sorry about the english!