You will have to update the management first. The ability to manage R81.10 gateways using R81 management will be made available through a future jumbo hotfix release. From what I've heard it's expected to be released sometime in August, but it's not set in stone.
With that said, just like when using R80.20 or R80.30 management to manage R80.40 gateways you are losing out on a bunch of the added features and capabilities. It will always be best to have the management on the same version.
My experience with R81.10 on management so far is very good. Especially this change seems to have improved the performance by a ton:
The Solr functionality used by the Security Management Server database is replaced with a PostgreSQL database to improve the stability and performance of the Security Management Server. Solr is still in use for logs and SmartEvent.
After moving from R81 to R81.10 on a management server that is also handling logging and smart event the fluidity is much better. It was very noticeable right away.
Certifications: CCSA, CCSE, CCSM, CCSM ELITE, CCTA, CCTE, CCVS, CCME