CrossRoads:
Lot more data needed to send out for TLC5940 tho. Lot more.
Can also do PWM on the TPIC6B595 OE/ for dimming.
Yes, 12 times more data. But SPI.transfer is fast, isn't it?
TLC5940 also around 3~4 times more expensive than TIPC6B595.
But if you want individual dimming, it would be the way to go. Using pwm on oe input of tipc6b595 would allow only overall dimming of the cube.
But maybe the op doesn't care about dimming anyway...