There are several criteria to pay heed to when selecting the tablet you want to buy. The first one mentioned in this visual is size but I would personally put budget before size. Depending on how much you can afford, the size you want, and the purposes behind buying a tablet, you can choose between the top brands embedded below.
I am a huge fan of Apple products and I have recently bought the latest version of iPad4 with retina display and I find it way better than the Samsung Galaxy Tab 10.1. However, there are several other options you can opt for. Enjoy
Source of this graphic is Mashable.