CRA vs Ops for the summer

Hi y'all!
I'm currently a first year Masters student. I'm doing management with a specialisation in finance. I have also cleared the CFA L1 and my ultimate aim is to break into Investment Management at a BB firm in London.
Since my undergraduate degree and experience so far have been technical, I wasn't able to get that perfect IM internship this summer. I managed 2 offers for this summer for an internship:
-Ops in a BB firm
-Associate at one of the top 3 CRA

Now, considering I want to land my next internship in IMD, which of these should I pursue? I know Ops isn't particularly related but its a big name and I could use the contacts I get to network my way in maybe.
Or learn from the CRA internship and better my fundamental analysis and fixed income knowledge?

Any help/past experiences would be appreciated.

Thanks!