It depends on your situation.
If a max total raise of one million USD is enough for your company to reach a meaningful milestone, or if you do not have up to $100,000 to spend upfront or if you have to move fast with your fundraising campaign, then Mini-STO is better. Otherwise and STO is better solution for your situation.
Basically, the difference between the Mini-STO and STO boils down to the difference between Reg CF and Reg A+. Simple like that.