4WD is a SELECTABLE SYSTEM. User determines whether to ENGAGE IT.
AWD is ALL WHEELS - ALL THE TIME - unless the user DISENGAGES IT.
4WD systems are "usually used" at LOW SPEEDS, in "low traction situations" - and, except for more modern/automatic 4WD systems, are "direct drive" systems - that causes additional wear/stress on the drivetrain at higher speeds. They (also) typically are not 4 wheel "torque sensitive" - as in - they drive all wheels with equal force.
AWD systems are designed for full-time, high speed utilization. In the Pilot setup - it is VTM (variable torque management) where the computer will control wheels speeds/torques.
I haven't (personally) driven one down here - no one HAS ONE YET (because the first few months of allocations are all going UP NORTH).
The notion that AWD is really only needed "in the snow, or off-road" is BS.
AWD in the Pilot, is probably a BLAST to drive - and would make this car even MORE FUN to tool around in. This engine HAS THE POWER to utilize a full-time AWB system effectively. And having all wheels driven, would enable those of us that drive a SPORT utility vehicle like a SPORTS CAR - have even MORE FUN with it.
Rick