On savings claims
A variance is not a saving.
A benchmark can show you are paying above what the evidence suggests the market pays. That is a question worth asking, not money in the budget. Whether any of it can be realized depends on how long the term has left, what exit costs, what the change would disrupt, and whether the higher rate is buying something you actually need.
So nothing is called a saving here until it has survived those questions, and a change that has not been confirmed against a later invoice stays described as a projection. It is a slower story to tell and a much easier one to defend.
How every figure is graded