I believe that Suiryu is the level of a low Dragon. Being half dead, he severely damaged Bakuzana. I'm sure if he was at his peak, he would have beaten him. Even if he had not won, he would have left him half alive. Even though he is slightly weaker physically, his combat skills are on a different level. I believe that Garou and Suiryu have the same speed because the game copied their movements and they both screamed from intense blows, that is, they did not contain their speed. However, physical strength cannot be scaled. The fact that Garou broke the game due to speed for the changers means that he is only marginally faster, because he obviously used a lot of effort before, just now he is slightly faster. Therefore, the whole fight and Suiryu and Garou were close to breaking the game, but Garou did it first. Therefore, we can scale their speed and combat skills, but not their strength.
Chosi was comparable to Suiryu, but still weaker than him. Suiryu simply by tensing his boobs was able to overpower Chosi's attack with his horns. Even if he is a thunderstorm demonic level, nothing prevents him from being a very high demonic level, so high that he is close to a weak dragon level like Bakuzan.