\(\left({CH}_{3}\right)_{2} \stackrel{\oplus}{{C}} {H}\):
carbocation will have more hyperconjugation than \(^{\oplus} {CH}_{2} {CH}_{3}\) because it is a secondary carbocation due to presence of two methyl groups on the carbon atom having positive charge. Greater the number of alkyl groups in a carbocation, greater will be the hyperconjugation and greater will be the stability of that carbocation.