FB page or FB Group

Do you recommend one over another? I have an opt-in ready after taking Amy Porterfield’s List Building class and keep reading that FB Groups are the way to go on FB and more engaging – so stalling on publishing my page. I feel like you’re going to say that I’ll know which one to do, or make a decision and decide it’s the best – but am asking anyway – thinking someone further down the on-line business path will have rich insights.