First, the model is different.
The models of Samsung s8 and s7 phones are different.
Second, the styles are different.
The s8 is a high-end smartphone; The s7 is an ordinary phone for the elderly.
Third, the performance quality is different.
s8 strong function, excellent performance and good quality; The s7 is weak and the performance is inferior.
Fourth, the price is different.
The s8 is expensive; And the s7 is cheap.