Lab experience for neuro PhD application

I need advice.

Currently in the UK. Want to apply for R1 neuro phds in the states.

At a crossroads with what master's project I should choose. The two options are: A) a project in a completely unrelated field (comparative evolution) (HEAR ME OUT - see below) and B) a project in neuro v closely related to my prev experience.

My background for context:

Worked in two labs so far. Both neuro. Lab 1, mol bio/ neurodegen, one summer. Lab 2, circuit neuro, one summer plus undergrad thesis (arguably my 'expertise').

Considerations for A vs B:

A)
It's a new lab. I think i'd be one of the first members to join (risk im willing to take).

I have called the PI on zoom, they SEEM SO SO LOVELY, a good listener, listens to understand. Seems like would be an amazing mentor, really talented and I could learn a lot from them. More one on one means potentially good letter of rec?

Obvoiusly less well known than PI B, name probably means nothing in the neuro network.

The project is very manageable, likely to get published within a year of completing it.

I'm really eager about learning the skills assoc w the project. I have an idea of the type of experiments i want to run in the future, and the methods they'd teach me are transferable. I could teach myself in theory. But the pi's really good at this stuff so it feels like a rare opportunity.

B)

If I worked in option B it would fit my progression into circuit neuro research. I.e would make a lot of sense, would seem like i've got direction.

The PI is famous, would probs write me a decent rec. Maybe not as good as PI A because less one on one time? But he's met me and seems to really rate me? So the rec could be glowing too...

Am worried I would be restricting myself? I'd learn less skills, since it's stuff v closely related to my prev work. I feel like i should also branch out and expand my network (the lab is next door to the one im working in rn).

But this also means i can hit the ground running and probably write a hella good thesis too.

Probability of getting published is a lot lower compared to A though, I think...