As for autolykos2 (ergo) it is good for Polaris and Fiji cards.
Compared with TRM it is slower for Navi cards and it is much slower for Vega cards.
Hope it will be better in next release.
Vega Cards is TRM territory they do it really really well... You should check the Watts in Navi too... in Polaris is between 1w-2W per GPU lower lolMiner... it will be interesting to know in Navi what's the difference. because that gives you extra chance to give more core to get higher Mhs