Same with any type loan (residential mortgage, commercial mortgage etc)
The difference is that a knowledgable broker will know which bank has the best chance of approving your loan type.
Each bank has different underwriting requirements.
Obviously when you ask them, they say that can do anything. Usually you only find out much later on in the process that it was declined by underwriting.
Any broker knows it as well. Even if it doesn't say SBA in the company name.