Does loyalty count ?

[Newton]

Lets put a hypothetical on the table .. imagine you have been contacted by a new client who is just starting out, to fulfill a contract in a certain timeframe, and you have undertaken this project. Another client who lets again say hypothetically is a huge affiliate, who needs a project undertaken and completed in the same timeframe, who has promised you future work and in return for doing this work will give you exactly double what your other client has offered. Which one would you accept if there was absolutely no way you could do both and have already taken on client A ?