To be-honest I would recommend neither, heres why:
My Hobie 16 came with a Hobie mast bob not sure whether it is a Baby Bob or the Mama Bob but either way I found raising the mast the most precarious if not impossible task to accomplish even when the wind was down, I had to rely on help lifting the mast into position.
I decided to take the bob off and can now raise the mast alone with no issues at all, in fact the first time I tried I over compensated as put in the same effort I had with the bob attached, the mast went up real easy and I nearly carried on over the front cross beam.
Taking the mast down was no easy feat, particularly if it was blowing a bit.
The bob does not way much but on the end of the mast it soon adds up.
I now use one of these tied to the mast head, they work really well even with a leaking mast, they come pre inflated, my one is as good today as it was when I bought it last season, they weigh next to nothing, and best of all, they only cost £4.80 ($7.47), sure they may not look the best but horses for courses.
http://www.ohbuoy.co.uk/product-category/marker-buoys/
Cheers.
