Yet, giving a fief to a lord is not enough a big enough bump for him to overlook you giving a fief to two lords he despises. Your relationship with all of these lords may drop by several points.
Here are the things you have to consider: There are benefits and drawbacks of doing either, and you should be very careful when granting fiefs as you can easily alienate a lot of your vassals if you give them out too fast. Politics in Calderia is very very tricky.