Low accuracy FACE - Verify API

Question

Team, 

I'm developing a project using API Faces to detect and compare same people on different photos.

When I use Demo Azure website (https://azure.microsoft.com/en-us/services/cognitive-services/face/) with links bellow, the accuracy was 95%.

Image1: https://www.biography.com/.image/ar_1:1%2Cc_fill%2Ccs_srgb%2Cg_face%2Cq_auto:good%2Cw_300/MTE4MDAzNDEwNzg5ODI4MTEw/barack-obama-12782369-1-402.jpg 

Image2: https://exame.com/wp-content/uploads/2020/05/obama-e1589812349634-1.jpg?quality=70&strip=info

Process used was done using APIs from Azure service with postman:
1. Use API Face - Detect and store Face ID key from json (URL 1) 2. Use API Face - Detect and store Face ID key from json (URL 2)
3. Use API Face - Verify, with inputs from Face ID 1 and 2 and store "Confidence" key

Result using API service is 80%, while 95% using Demo.

How is the way to be followed to get the same result ?