I’m running a “normal” node and the odisrespector patched node. Both return an  estimatesmartfee within 1 sat of each other at 1/6/144 block targets. The mempool difference is usually over 100 blocks. 

 Good data point, but would be interesting if there are bigger differences occasionally over time. 

 I built the ordisbot precisely for that. Though it sources the data from the mempool.space websocket API, not estimatesmartfee.