Is Atomic Samurai speed in the same level of Flashy Flash? I found this comment in a forum


  Should'nt Atomic Samurai be sub relativistic since the databook puts
  his speed on the same level as Flashy flash?


Is this true? Is Atomic Samurai speed in the same level of Flashy Flash?
I can give at best a partial answer.  The part I can give are the databook pages concerning Atomic Samurai and Flashy Flash:



Their statblocks are nearly identical, and the one stat they have a max rating in is the same.  According to a post in a gamefaqs thread the stats listed in order are


(Tairyoku)Physical strength/Stamina
(Chiryoku)Intelligence 
(Seigi-kan)Sense of Justice 
(Jikyu-ryoku)Endurance 
(Shunpatsu Ryoku)Instantaneous Force/Speed 
(Ninki)Popularity 
(Jiiseki)Success/actual Results 
(hero-specific ability rating)


I've bolded the one stat they both have at maximum.

However, these are not objective stat blocks, they are stat blocks from the perspective of the Heroes Association (or possibly Genos, as there's a Saitama stat block later that's specifically from Genos's perspective).  King, for example, has max stats in every single category, which we know to not be objectively accurate.