i found similar two question on Askubuntu that are 3-4 year old.
But this ubuntu page says
Before 12.04, Ubuntu server installs a server-optimized kernel by default. Since 12.04, there is no difference in kernel between Ubuntu Desktop and Ubuntu Server since linux-image-server is merged into linux-image-generic.
so, i want to know whether there is difference between minimal and server or not ? if yes , then what parameter differ them and which one is better for server deployment ? i am using Ubuntu 14.04.3.