Can we use different types of Botox for a touch up? Or must it be the same as the one I did before the touch up?

There is no clear answer to this as most studies have used the same kind of botulinium toxin throughout
In theory it should be ok!

Thank you for your question! In the US there are 3 different neuromodulators; Xeomin, Botox and Dysport. You do not have to use Botox for your touch up. You can use any neuromodulator and to get the same effect. Best of luck!