Well obviously if your heart is dead set on podiatry residency, it is highly recommended that you take Podiatry Boards. Pod residency directors just aren't very familiar with COMLEX, they just simply don't know how to interpret your score. Moreover, as a general rule of thumb for DO students applying to Pod, your score has to be 5-10 points above other applicants to be considered competitive so make sure you murder that test.
It would also be beneficial for you to take a year off after after DO school and do a year long Pod research, hopefully you could squeeze out a couple publications by the time you apply. Even then, it's still not guaranteed that you will a get a spot.
Go with OMGE if you don't feel like jumping through these extra hoops, but let me warn you, these programs are subpar compared to the pod programs since most of them aren't university-based like those at UCSF, Stanford and Havard. OMGE trained pods have very limited opportunities post-residency, very few are allowed to work at the large academic hospitals and join big private practice groups; fellowship opportunities are non-existent.
PS: you would have been better off going to an MD/Pod school if you knew you wanted Pod from the start.