Let's get real, an Edo tensei is an Edo tensei
The only difference is on what power/level they get revived in.
As long as you have a body sample, it doesn't matter.
What do you mean an ET is an ET..:eww: that makes no sense. Part 1 oro's et compared to his shippuuden version is on a completely different level. If Hiruzen and Orochimaru were to rematch with his current Edo feats, then he wouldn't need to summon both Hokage, 1 would suffice. That is the difference! Of course et is et, but the power levels of the different versions are what makes the difference, honestly your comment looks really stupid. If tobiramas et is below part 1 orochimaru then his summonings must not be all that great. Against a high level opponent they'll just be fodder.
Imagine part 1 ET Hashirama could use Sage Mode or Tobirama used FTG against Hiruzen... He would have been annihilated super neg diff.
And @Penguin, in case you were referring to me, I never insinuated that GK power depends on how powerful the ET are. I just meant the power and skill of the ET themselves can vary.