This is wall mounted economical cold water kitchen tap, which is suitable for some customer who have limited budget and are willing to sell them in tropical places, such as africa, south america, south east etc. Thick electroplating can make them duarable. 
This is deck mounted economical stainless steel cold water kitchen tap, the water aerator is big as you see, and there is 2 ways of water sprayer to switch. Except the brass cartridge, the other part of faucet is 304 stainless steel. So price is lower compared to brass faucet.
This is wall mounted SUS 304 stainless steel cold water kitchen tap, it's mounted on the wall, so it's limited by kitchen sink table. The shape is rectangle and straight. Besides, good quality SUS 304 can resist rusting and easy to maintain.
This is wall mounted competitive SUS 304 stainless steel cold water kitchen tap, it’s good quality 304 stainless steel, so in daily life using, it can prevent it rusting and keeping in a good condition. Wall mount style can save some place in kitchen room.
It's wall mounted brass cold water kitchen faucet, the pipe is chrome elctroplating stainless steel material, while the under the pipe part, it's made of Germany brass. It's only cold water pipe, which suitable for some customer in hot place market and limited budget.