If there is any difference at all, it will be completely immaterial to all the other money being spent to camp. Buy what makes you happy to spend time in.
If fuel consumption is that much of a consideration in the decision, you should be towing either of those tiny trailers with something much smaller and more efficient.
2018 Kodiak Ultimate 291RESL w/Reese Strait Line WDH and dual-cam sway
2018 Ford F-250 PSD
2013 RAM 2500 CTD 4x4, 2013 Expedition w/max tow