I would go with the 135 4000k. Strictly because of the cost for performance. The 4000k board will probably veg that area fine even at around 70-80 watts. But you could also change that tent/board anytime you wanted and flower under it. It won’t quite produce like the 3000k, but the 4000k spectrum is as good or better than most of the viper/miezhi style lights. Plenty of people growing good weed under them, and a little reserve power would dial it up nice.
I’d have to go look at the price difference in the kits, but the only difference in cost should be driver, and that shouldn’t be more than $10-20.