compared to the Internet speed

When I successfully implemented my branch office, can I get 10Mb internet speed like HQ?
My HQ has internet speed of 10Mb, branch office has internet speed 2Mb, now I want to deploy VPN to the site.

Some ISPs have different bandwidth restrictions for metropolitan/national and “the rest”
If at branch office you have 2 Mbps no matter the destination, you are out of luck. No VPN will help you.
At least this is what I understood you are asking.

Upgrade branch office connectivity to desired speed. You cannot use what you don’t have.