Two models side by side: measurements taken by the author in their reviews, and their conclusions. The better value in each row is highlighted.
In brief: Based on review measurements: Capacity: Ugreen PB107 (10160 mAh vs. 7124); Energy: Ugreen PB107 (36.78 Wh vs. 26.85); Test current: Battery for Teclast Tbook 10S (6 A vs. 2.5); Price: Battery for Teclast Tbook 10S (19.5 $ vs. 20.5).
Only in one review: Voltage 5 V (Ugreen PB107); Current 2.1 A (Ugreen PB107); Resistance 37 mΩ (Battery for Teclast Tbook 10S).
Battery for Teclast Tbook 10S: The battery measured 7,124 mAh and restored the tablet’s runtime to roughly like new.
Ugreen PB107: Capacity matches the rating and output reaches 2.5 A; recommended if Quick Charge is not needed.
Figures were taken from the review text and checked against the quoted passages. Measurement conditions differ between reviews, so read the reviews yourself before buying. Prices at the time of review.