I had to look up the term bond tent, never heard it before.
This is a reverse glide path approach and theoretically it makes sense to reduce retirement date and sequence of returns risk. There quite a but of literature out there. I would assume the difference being having to hold individual bonds to maturity (I'm assuming this is what your advisor means by a ladder). This would lose the benefit of cheap/easy rebalancing, which is easily done with a bond fund.