4wd is better than 2wd any day. Front wheel drive doesn't exist without removing parts on a 4wd and it drives like crap. I've had it happen on my t-maxx and my savage when the center axle broke in the rear. The front tires just spin and it walks all over on you. Might work a little better if the front diff was locked, but most of the weight shifts to the rear when you gas it and you loose traction.
Not sure how GT's handle, but my losi xxx-nt (first truck for me in the hobby) handled really well for awhile. But I neglected to change stuff when you should, like ball ends, bearings, hinge pins... so it had a lot of slop in it after a year or so of beating the crap out of it. I only replaced stuff when it broke entirely.