The Samsung Galaxy S5 has 17 models and variants. Generally the variants are the same device models with some different features and specifications, as the amount of internal storage, processor or just 3G/4G frequencies that may be different depending on the country where the Samsung Galaxy S5 is sold.
Compare the 17 Samsung Galaxy S5 models and know what are the specifications that differ one from another version in the full datasheet.
See here on the PhoneMore all Samsung Galaxy S5 versions.
All prices are in USD.