The 1600 white bulbs are real slappers. If you can snag a costco deal or something.. do it.
The 1600 color bulbs are just the old color bulbs with an upgraded white LED, which is still really nice but not like... a huge upgrade if you're trying to blast really huge color. They are overpriced as heck right now. Really a bummer move.
... my money says they are coming out with a new color bulb in the next year