My thoughts: Image with the box stands out more. Additionally, I think you should also rework the tablets on the box image and also make the box look 3d so it actually looks like a box. Have the tablets with their packaging images more prominent/stand out better like top left competitor does. Presumably you will be using ppc advertising, so if you go with the tablets alone then when your ad is shown elsewhere, no one will know what it is from looking at it. Going with the box makes it very obvious what the product is. Improving the tablet images with the box behind and you’re kind of combining the two images you’ve chosen as your preferences here, so that’s a plus.