Mullvad VPN, Mullvad browser, Mullvad search engine.. never ever put all your eggs in one basket, so much data and meta data can be collected and cross referenced to your ID.
If it takes a correlation of the 3 datasets to identify you, then it is better to use 3 different providers.
However, if any one of those datasets is sufficient to ID you, then it is better to choose a single provider.