Parts (LMC vs. Classic Parts)

[03BlkZ]

I'm sure this has been debated enough already and I am seeing not so great reviews out there for both. I assume the both pretty much get their parts from the same vendors. Anyway my question: I am about to be ordering rear springs, rear shocks, trailing arm bushings, track arm bushings, track arm stud, maybe brake lines, brake cylinders and attaching hardware for these components. I can find everything in need on the LMC website but not on classic. How would these items differ being ordered from one or the other. Any other places to look for parts? None of my local auto parts stores have much to choose from. Also this is for my 1970 C10.