Currently running a 2020 Chevy 4WD RST 6.2 L 420 hp version, 19.2 mpg on the highway, 17.5 highway towing my 22' Hewescraft Searunner. Happy, plenty of get up & go when needed.
Gill;
Don't run both on my boat, only have the fishawk, however my cousin has the subtroll on his boat, so when we trolled side by side, his subtroll was consistently 0.5 mph slower than my fishawk. Hope this is helpful.
Happy New Year!
John
My 2011 Hewescraft Searunner 220 (regular transom w/ soft top) has served me well for the last ten years, zero issues with the boat.
Merry Christmas to all, & a Happy New Year!