very close between both engines, i have used both engines extensively. the honda engine responds very well to modifications and is marginal on cng while the toyota engine is strong and is very good on cng.
if it was me i would pick the honda vtec but i have beaten the honda vtec time and time again in drag races in an auto 5afe engine with minimal mods...
close call between the two... i cant choose..
maybe the only thing which can make me choose is that d15b has a lot of aftermarket support while the toyota engine does not...