That is obviously an incorrect assumption because the reference is done to outdated manga pages.
Hashirama is the best clone creator in the manga and his clones are almost indistinguishable. It has been proven many times in manga already.
KM naruto was needed because no one could distinguish between zetsu clones and zetsu clones are basically weaker version of hashirama clones.
YET Madara could see through hashirama's clone with his EMS :
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Do not confuse kid neji with kaguya the god,
Mokuton clones > Shadow clones
rinnegan+sharingan+byakugan+sensor ability > EMS > byakugan