im not saying tsukishima is smarter im saying his fullbring ability let's him kno evrything as soon as he cuts you anything he cuts for that matter an he cut byakuya petals as soon as their battle started im saying it would take urahara much more time to figure out senbonzakura hole attack pattern.
senbonzakura has gotten even faster tsukishima said that his self, its way more powerful than the bala aswell an its much harder to stop an that not even the end of byakuya's power.
the reason he was abel to figure out that bala tec so fast was becuz its like a cero he has seen a million ceros in his life witch made it quicker to analyse u cant compare such a weak an simple tec to senbonzakura.
lol when he fought yami was the first time he saw bala, and he analyzed it what makes senbonsakura any different ? Both senbonsaku and bala require hand movement which is how Urahara analyzed bala same would happen with senbonsakura unless you have an explanation to prove otherwise.
I will give you a point because you said that he cut byakuya's petals and found out his weakness.
But this is Urahara we are talking about, his feats in terms of analyzing things are off the charts, frankly i don't see anything byakuya can do that would kill urahara, he has inflatable gigai that was even able to fool aizen and yami what makes byakuya any different.
In terms of Speed Urahara is faster, he was able to keep up with yoruichi while Byakuya could not keep up with yoruichi .
In terms of power, uraha has a technique similar ichigo's getsuga tenshou and can even change the direction and shape of the attack.
Kido: urahara is better, pretty self explanatory (sky canon etc)
Even just based on feats Urahara > Byakuya.