Were their comps higher or lower. Comps from a different city, that's a new one for me. Are they closer or farther. If farther, there is your answer. If by chance you used their comps, they could send your original appraisal to the state. Citi used to do that.
Dear lender
Your comps come from a different city stigmatized by crime, drugs, and outdoor neighbors. My comps are from safer city. yuk yuk yuk.
The comps you picked look cherry picked, to bring in a lower value
Dear client, you is now scratched off my list.