You can't go wrong with either.
For me, I would take the Rodent 9.
Higher end steel, Fantastic heat treat. You should get both better edge retention and performance from the steel. Scrapyard uses SR101 steel (their modified version of 51200, which incidentally is a great steel. Ball bearing steel, that a lot of custom makers really love for forging. The edge retention and ability to take a wicked edge and keep it, is one of it's really endearing features ). The handle scales are also better machined from a hand comfort standpoint
(The ESSE's are a great value, and have an absolutely top drawer warranty. The steel is 1095 which is a good, solid work horse steel).
Pick the one that appeals most to your eye, and wallet, and you will be happy.