Are most rare weapons on Utimate?

[Hrith]

Photon Drop is not a rare item, just a regular tool, like Monomate, etc.

Also, drop rates are tougher on Ultimate, the example is simple, if the weapon drops in Hard or Very Hard, then go for it, it WILL be tougher in Ultimate:

Yellowboze Hard Pan Arms, Cave -- Pan Arms' Arms, 1/142
Yellowboze Ultimate Pan Arms, Cave -- Pan Arms' Arms, 1/350

Skyly Very Hard Sinow Berill -- Sinow Berill's Arms, 1/160
Skyly Ultimate Sinow Berill -- Sinow Berill's Arms, 1/788