No, lesser and lesser platinum are just 2 names for the same snake.
http://www.worldofballpythons.com/morphs/lesser/
To make a palatty daddy you cross a lesser with a "het daddy" (which is a dominate gene)
http://www.worldofballpythons.com/morphs/platty-daddy/
its just like how pastels were originally called jungle pastels but over time we have dropped the jungle.
Here is Ralph Davis' explanation: http://www.ralphdavisreptiles.com/co...all_python.asp