What's exactly the difference among the the three different versions listed here? There is: Crucial 256GB M4 SATA 6Gb/s 2.5 inch Internal Solid State Drive Crucial 256GB M4 Solid State Drive 2.5 inch with bracket Crucial 256GB M4 Slim 7mm SATA 6Gb/s Internal Solid State Drive
That applies to other capacities as well. I understand the second one comes with the 3.5" adaptor bracket, although the price difference seems too much just for that. That's fine but what about the first and third options? If I understood correctly, the dimensions of the third one are bigger but it's thinner?
Looking at the crucial website doesn't help much since there's a single model there... I want to buy one for my late-2011 13" MacBook Pro, would the first option (cheapest at £118 at the moment) be the correct one?