Bridge Chestnut 11 - "At teams, always play in the safest contract at partscore, game or slam."
At teams, there is little difference between 3 making and 3 making.
Similarly, 6 making scores the same as 6NT making. So, if 6 is the safer contract, then that is the contract which we should select.
At pairs, 3NT will often be selected ahead of 5 of a minor. 3NT making 10 tricks achieves a much better score than 5 of a minor making 11 tricks. For this reason, minor suit contracts are frequently not investigated thoroughly at pairs. Many players regard teams as a more "pure" form of the game since all denominations are treated with equal respect.