Both boards are VERY well built. The bases on both are super durable and should last quite a long time since you ride cable most of the time. We have trex on our rails, which is harder on boards than what you find at a cable, and trust me when I say they can take a beating.
Both boards can also be ridden well behind the boat, as I'm currently riding the Saber 145, and my buddy is on the Vibe 142. The Saber with track a bit better on the water because of the larger fin set up.
Landings on the Saber are really, really soft, and it pops hard. The flex is so much fun.
You can't go wrong with either board in my opinion.