Well, chances are, there'll be more tote bots than bin bots, so I think that having a bin bot would make your team more valuable. There are less bin bots than tote ones to compete against, so it'll be easier for your robot to be well-known as an important team member. Bin bots can also score more points by stacking bins on containers than tote bots can by only stacking.
So, I'd say bins.
