Esau lost his inheritance.
The prodigal son spent his.
Salvation is for those who persevere and who repent of their sins after they occur.
They are the same. After having control of their respective inheritances, they both SOLD them for things that they wanted. Esau sold his for some yummy soup, and the prodigal son sold his for wine, women, and song. The point is that they both had legal control over their inheritances. We, as believers, do not. They are held for us in trust until the day we enter Heaven. We do not have clear title to sell them away. Could you sell your inheritance as a believer to enter Heaven to ME for say, a million dollars? Of course not. The Godly inheritance concerning salvation is NON-TRANSFERABLE. :)