What would you choose: Project Finance at tier 2 bank or M&A with Big 4?

Hello experienced primates!

I am a Junior at a semi-target and I got a couple of internship offers for my junior summer (1) M&A at a big 4 accounting firm. (2) Project Finance role at a Tier 2 Bank's IBD (Don't know why they classify it this way). On one hand, option 1 has the most relevant experience but big 4 accounting firms a rather poor reputation in the investment banking scene. Option 2 has semi-relevant to little relevant experience, but the bank has a good rep. Considering that I might only have at most 1 more internship before I graduate/ apply for full time, what would best position me for a BB IBD summer?

Any advice or comments are really appreciated!! Thanks!