GPG seems to alter imported keys

So I've never used gpg (2.0.14) before this week and I'm no cryptography pro, but the results I've been getting with gpg seem odd. When I import keys (e.g. gpg --import public.key) that were generated by OpenPGP, gpg seems to process them successfully and reports no errors. However, when I then export those keys and compare with the originals, they are ***not*** the same. I assume this is why gpg fails to decrypt messages created [elsewhere] with the original public key. Steps to reproduce: use a tool like https://sela.io/pgp/ to generate a key set, import into gpg, export from gpg, compare. Incompatibility? Missed a step? Software gods continuing to plot against me with a series of minor nuisances?