Ask HN: Switching from big corp to smaller company management position

I am wondering if some of you did such switch - working only for big IT companies (corporate culture etc) and then moved to a smaller one (but NOT a startup, let's say 30-40 people, good revenue, 7-8 years on the market). If so - what are your thoughts? Did you regret this? Did you move back to the bigger company in the end?

Brief background: currently I'm working on middle mgmt position in big corp, my previous job was also in huge company (manager of dev team(s)) and now I have a chance to join much smaller company (fintech) that is opening their office in my city. Any suggestions?