Are symbol price in same broker equal to each account?

Hi,

I am using in Open API different accounts together.

Some accounts are from same broker e.g. Spotware.

Other accounts are from other brokers e.g. ICMarket.

My question is the symbol values from  spot event always identical,

if the broker is same, but different accounts?

if the broker is same, but live or demo?

if the broker is different, can the symbol spot values be different?

Thanks.