It's the "HP required" percentile difference that's simply stunning and as that's only at 20mph, remembering wind resistance is exponential (double the speed, wind resistance increases four times etc.).
Touring 100% @ 20mph
Recumbent 75% @ 20mph
Equals a 25% reduction in power required to maintain 20mph... & that's even unfaired, just rider position.
There's precious few engine mods that'll boast such massive differences