I had both when my 4runner was IFS.
Tru-track up front= broke the short side inner just like you.
In the deep snow it it was better than open diff. On roadway snow it was OK too. A little harder to turn in 4x4 around town. In the rocks it was no better than open. Lift a tire and you might as well run an open diff. No. using the brakes didn't help lock it up. that is how I broke the inner short side output shaft.
Lock right up front = broke outer CV joint instead. In the snow it was fine as long as you only wanted to go straight and all your tires were equally worn out. Pretty sketch on roads in town and hard to turn in 4x4 sometimes. Deep snow was fine.