As someone on both this is not true ime. finasteride has had no side effects for me, while adderall makes me irritable and paranoid when it wears off, not to mention the insomnia it causes.
For what it's worth, stimulants' effect on sleep varies a lot from person to person. I definitely know people who struggled with insomnia from amphetamines, especially when their dose was too high, but for me and others I've talked to, it let me lay down and choose to sleep, which as someone who had suffered from insomnia most of my life, was a godsend.