Why website loading speed on mobile is through testmysite.withgoogle.com so strange?

Check download speed of my website. Testmysite.withgoogle.com Google shows speed on mobile through 3g and 4g.
And it is very strange, it shows the download speed of my website 4.8. Compared with 10 competitors: all loaded much faster(2-3 sec).

In this case, when tested through Google PageSpeed, on descope index my website 98, to mobile 64. It's better than almost almost all those of the competitors.

Check webpagetest.org(speed descope), it speed full download generally 1.2 seconds. It's better than all competitors.

Also looked at Yandex.metric download speed, it in mobile is slightly lower than descope, but normal 2 something seconds on average.

Why Testmysite.withgoogle.com shows such data?
March 23rd 20 at 19:46
3 answers
March 23rd 20 at 19:48
That of time download content different
In this case, the essence is clearly not in this - alejandra commented on March 23rd 20 at 19:51
@alejandra, my fact is incontrovertible, but your words yet unproven. - kayden.Quitzo commented on March 23rd 20 at 19:54
March 23rd 20 at 19:50
Better tools look more professional.
Take gtmetrix and it see exactly what is loaded into the waterfall.
loading.express it a look on what parameters we have to work.
Well, right here they write that Google pagespeed for clear evaluation.
March 23rd 20 at 19:52
Another rather important point to accelerate the optimization and compression of images on the website. You can optimize manually each picture (using Photoshop for example), you can automatically (via special services). Here's an interesting article on this subject: https://pr-cy.ru/news/p/6831-kak-i-zachem-optimizi...

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