I use Winsor & Newton as well as Grumbacher oil paints and recently have been using Gamblin.  I have used in the early years of my painting less expensive tubes of paint and the difference in the higher quality of paint does make a difference. 

I have used a few small sample tubes of Schmincke oil paint which was purchased by my daughter at a yard sale. I have used Permalba oil paints but I still like to go back to the Winsor & Newton or the Grumbacher paints and Gamblin.  The Permalba has a creamy texture and has a lot of linseed oil in the paint.