well i have ran a 1/8 losi eight buggy and yes it does teach you how to drive
better but you cant drive, them hard and there not the stable thing.
i havnt raced my eight -t 1.0 yet on, the track but i have tested it out on the street and it easyier to drive and stable. but you can drive them harder in the corners, thats why i like them.
as far as price between a buggy and truggy, the truggy parts are a bit more but the most expensive is, the truggy tires but they last longer. and servos can be more on a truggy if you choose.