I have tried so many shampoo bars and have now given up - none of them work well on my hair. So I will be taking a travel size bottle of shampoo which I will replenish from abandoned shampoo bottles in the hostels! Then a good old bar of soap for all my other washing needs
If you are comparing a liquid shampoo to a shampoo bar, especially if you are used to a liquid shampoo that claims to be "
moisturizing", shampoo bars will definitely feel different. Many liquid shampoos have added silicones and other ingredients to make your hair feel moisturized and soft and have nothing to do with cleansing. These ingredients can build up on your hair and even cause long term damage. Shampoo BARS almost never contain those ingredients, so as you rinse the suds off, you might find that your hair is squeaky or catchy (I don't know how else to describe it). Even so, shampoo bars usually contain very mild ingredients meant to gently cleanse your hair and are the correct pH for healthy hair. (Stay away from shampoo bars that are made with lye, like soap. Those have a pH that is far too high to be healthy for hair).
The moisturizing/softness elements should come from a good conditioner; NOT a shampoo. And good conditioner bars include ingredients like cocoa butter, jojoba oil, coconut oil, argan or Abyssinian oil, and hydrolyzed proteins. They outshine liquid conditioners by a long shot. No comparison.