Does torque@wheels readings change by the about (ie in RR guesses, lol) the same amount from flywheel to wheels like BHP does or?

Also what can we say is a fair 4wd transmission loss? 15%? 20%?

Dont need a perfect answer, just roughly as trying to compare 2 results, one with just wheels results (RR), and one with just flywheel results (engine dyno).