haynes repair manual

Hi, I wanted to get a repair manual for my 98 Blazer so I searched for a Haynes Repair Manual online just now and found that there are two different kinds, one is with a drawing of a blazer on the cover and the other is a photo of a S-10 on it. The one with the drawing cost 19.95 and the other cost 11.95. I dont really know the difference between the both of them except the price.

Any advise is appreciated. Thanks