Sasuke gave V1 Bee some speed hype. V1 Bee isnʻt on the same tier of speed as V1 Ei, nor V2 Ei.
If you want to talk about speed feats, SM Naruto blitzed Asura path from hundreds of meters away. SM Jiraiyaʻs shunshin was so fast, he could get in the pipes behind pain before pain could turn around. Pain > Deidara.
KCM Naruto was obviously not using his shunshin....
For the first part, base Naruto was moving as fast as three tomoe sasuke, so by that logic, base naruto = 3 tomoe sasukeʻs speed.
Next, look at how KCM NAruto lands.
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Obviously no one shunshins with their back facing their target, and narutoʻs KCM shunshin is so fast that thereʻs no room for conversation in between the movements.
...that doesnʻt put sasukeʻs speed on BSM NArutoʻs level, it puts Sasukeʻs V3 susanoo on the same level of speed as BSM Narutoʻs avatar when sasukeʻs susanoo is powered up by Naruto and Juugo.
EMS Sasukeʻs reactions = BSM Narutoʻs reactions. his shunshin speed isnʻt on the same level as KCM Naruto.