Ffwahahah even 5th or 6th Gate Gai is much faster than V2 Ei at max speed. V1 Ei gets clowned by Base Gai or 1st Gate Gai.
Gaara saw Ei fighting more than once, he witnessed V2 Ei more than once, he even witnessed Lightned V2 Ei. He didn't seem impressed at all. When he witnessed 7th Gate Gai, this was his reaction:
You must be registered for see images
You must be registered for see images
You must be registered for see images
Gai clearly pressures Juubi Madara with his speed and taijutsu skills, without letting him to touch him with the Gudodama staff or balls, and manages to corner him and launch his finishing attack, even if then is countered and defeated back. Gai even manages to touch Juudara, even if his hits are parried; the focal point is that 7th Gate Gai is fast enough to fight on equal foot against Juudara in a physical brawl, he even pushes him back, he gets defeated because Juudara overpowers him. While Minato got defeated because Juudara straight completely outspeeded him, even if Minato just needed a mental reaction to use Hiraishin, and he couldn't pull that. Minato who clowned max speed Ei. Hence 7th Gate Gai's speed > SM Minato's speed > Minato's speed > Ei's max speed. Not to mention that Ei couldn't hope to hit Edo Madara, who casually reacted to his V2 speed, and Ei needed to be furtherly amped by Onoki. While Edo Madara was straightly up hit by Gai's Hiru Tora, his fastest punch in 7th Gate, and the much much faster Juubi Madara was pressured and nearly surprised by 7th Gate Gai.
Gai clowns the Raikage everyday, by both feats and portrayal.