The only way to know what medication will be like for your child is for your child to try it. Everyone reacts differently to stimulant medications because it depends on genetics, metabolism, and neurochemistry of each individual.
What’s good about stimulants is that you can stop taking them if there are too many negative side effects. They work when in the system (4-12 hours depending on the medication) and have no effect when not.
Here’s a great discussion of why different families decided to try stimulant medications and the outcomes:
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism