Boutique ECM-focused Equity Research FT job VS Family Office (Multi-asset) out of College

I'm not sure if this is the appropriate forum for this, but I'm seeking advice on choosing between two potential roles right out of college.

For context, I have an offer for a small family office (<200m AUM) as a multi-asset investment analyst (PE, private credit and public equities), while being in the late stages of interviewing with a boutique ECM-focused ER firm focusing on DD and research on companies that are in the process of an IPO. 

If my long term aspiration is to work in the public equities investing space, which of these two roles will give me a stronger profile? The challenge here is that the family office is rather unknown and I'm afraid that starting my career in a family office will hinder my exit opportunities. At the same time I'm not too sure if an ECM-focused ER role (e.g. DD and research for institutional investors to decide if an IPO is worth participating in) provides me with the skillset and credibility to exit to the buyside, as there seems to a disconnect given that the research work done in the ER role will not be touching on any publicly-traded stocks. I don't have any other interviews in my pipeline so its down to these two options at the moment.

Comp wise the ER role is ~10% higher than what I was offered for the family office role, though this is a lesser concern right now. While I'm still interviewing for the ER role, I would like to know any of your opinions on these two roles, so I can decide if I should continue the interview process with the ER firm or give it up and just take up the family office role.    Thank you!