MM FIG versus TMT Boutique - thinking about exit opps

I currently have an offer in hand from a well regarded MM FIG bank (in their depositories group) - ~$750MM is average transaction size and they have great deal flow. I'm also in the process of interviewing with a boutique that focuses specifically on TMT - not a brand name, average deal size and exit opps are unknown, headcount is around 80 and deal flow appears to be solid. In terms of exiting to generalist PE after a couple of years, or lateralling to a BB or MM in TMT / Healthcare / Industrials, which would provide the best opportunity in terms of exit opps?

I'm assuming I'll get a lot more deals done at the MM, but given it's depositories I'm not sure I'll build the right fundamental skillset which could pigeonhole me. On the other hand, the boutique is small, isn't a brand name, exit opps are mostly unknown but it is TMT and I would be building the right fundamental skillset... any help here is much appreciated.