S&T: Tried and true desk or 'start up' desk?

This is not a typical 'which desk' question, but rather about the different experiences you'd want to have on a desk

I'll be preparing for a ft analyst stint at a BB this upcoming summer and am wondering about desks. Getting straight to the point, I wanted to hear some thoughts about desk selection. Two options:

1) Try and join an existing desk with a reputation for being extremely good at what they do; in essence, aiming for what already has been established and successful

2) Try and join a relatively new desk (the one I have in mind has literally, about three people. Literally, just started)

The first choice is presented for obvious reasons; if you join one of the best desks at the firm, you'll be surrounding yourself with the best traders to learn from, you'll be in an exciting environment with a legacy of success and life seemingly will be pretty damn good

The second choice might not be so obvious: the way I thought about it is that if you start at a smaller, newer, underperforming, etc. desk, you could be the guy who turns things around. You're given a ton of responsibility from the get-go and have the chance to mold the future of a significant part of the firm and this inherently seems to give a different experience than the first choice (although I can't put my finger on specifics)

My long term goal is a career on the sell-side; this may or may not be relevant for your thoughts. They say seeking advice is nothing more than seeking confirmation, which I won't deny. However I wanted to see what current/former traders think about the choice

Thinking retroactively, can you talk about your experience if it relates to either of the above options?

Thanks