The pros and cons of each generations have been discussed to death so i will make it short.
I have 2006 T4R that's been on permanent loan to my parents since 2008, and I also have 2012 T4R so I'm familiar with both gen.
Few days ago, I sold 2012 T4R and made 2006 my daily vehicle.
To me, the biggest factor in favor of 2006 T4R was the center differential that enables it to become a permanent AWD in winter months. I drove 2012 T4R in few winter months. Often times, the road condition was not slippery enough to engage in the part-time 4WD (unless I risk drivetrain damage). Yet more than a few occasions, especially at a traffic light on the road with slight inclination, the rear wheel would slip rather embarrassingly even with a gentle throttle. On those occasions, I could just power it forward with wheel slippage (and the possible loss of vehicle control) OR I could stop the vehicle, engage in 4WD, and then move forward. Needless to say, both are less than desirable options, especially for a vehicle like T4R that's supposed to handle off-road and cold weather well.
2006 T4R, on the other hand, one can have permanent AWD all winter months with no worries...
Admittedly, if I had 2012 T4R Limited, I might have kept 2012 instead.
Hopefully, Toyota brings back the selectable permanent AWD capablity in the next gen T4R cuz my 2006 is not getting any younger (although it drives just like the day I bought it)
I have 2006 T4R that's been on permanent loan to my parents since 2008, and I also have 2012 T4R so I'm familiar with both gen.
Few days ago, I sold 2012 T4R and made 2006 my daily vehicle.
To me, the biggest factor in favor of 2006 T4R was the center differential that enables it to become a permanent AWD in winter months. I drove 2012 T4R in few winter months. Often times, the road condition was not slippery enough to engage in the part-time 4WD (unless I risk drivetrain damage). Yet more than a few occasions, especially at a traffic light on the road with slight inclination, the rear wheel would slip rather embarrassingly even with a gentle throttle. On those occasions, I could just power it forward with wheel slippage (and the possible loss of vehicle control) OR I could stop the vehicle, engage in 4WD, and then move forward. Needless to say, both are less than desirable options, especially for a vehicle like T4R that's supposed to handle off-road and cold weather well.
2006 T4R, on the other hand, one can have permanent AWD all winter months with no worries...
Admittedly, if I had 2012 T4R Limited, I might have kept 2012 instead.
Hopefully, Toyota brings back the selectable permanent AWD capablity in the next gen T4R cuz my 2006 is not getting any younger (although it drives just like the day I bought it)