In general, to wear a turban is a Sunnah. Offering Salah with a turban is rewarding and is reported as the habit of the Sahabah (radiyallahu ‘anhum).(Sub heading of Sahih Bukhari before Hadith: 385). But, the Hadith you question is unauthentic.

 1) Sayyiduna Jabir (radiyallahu ‘anhu) reports that Rasulullah (sallalahu ‘alayhi wa sallam) said: ‘ Performing two rak’ahs of Salah with a turban is better than seventy Salahs performed without a turban’.(Musnadul Firdaws, Hadith: 3233)

‘Allamah Sakhawi (rahimahullah) says this Hadith is not proven. It is therefore not suitable to be quoted.(Al Maqasidul Hasanah, Hadith: 717)

 2) Sayyiduna ‘Abdullah ibn ‘Umar (radiyallahu ‘anhu) reports that Nabi (sallalahu ‘alayhi wa sallam) said: ‘Compulsory or optional Salah performed with a turban is equivalent to twenty five Salahs performed without a turban, and performing one Jumu’ah with a turban is equivalent to seventy Jumu’ahs performed without a turban…’(Tarikh ibn ‘Asakir, vol. 37 pg. 354-355)

Hafiz ibn Hajar (rahimahullah) has declared the above Hadith as a fabrication. ‘Allamah Sakhawi and ‘Allamah Munawi (rahimahumallah) are also of this view. (See Al Maqasidul Hasanah, Hadith: 717, Faydul Qadir, Hadith: 5101 and Ad Di’amah of Muhammad ibn J’afar Al Kattani, pg. 26)

 The ‘Ulama say performing Salah with a turban carries more reward. However, this is without specifying any specific amount or number of reward.(See Fatawa Rashidiyyah pg. 54)

 And Allah Ta’ala Knows best

https://hadithanswers.com/salah-with-a-turban/
https://islamicportal.co.uk/hadith-query-virtue-of-salah-with-turban/
https://islamqa.info/en/answers/155330/virtue-of-praying-in-a-turban