Built in Sound
The W1000 has a small, rear facing 5 watt speaker. It actually throws out a very healthy amount of sound. Of course, bass is noticeably limited. It may not be surround sound quality, but it will do the job in a pinch. I can picture taking out the projector for Sunday football, plenty of volume.
And, consider, this projector is suitable for business presentations. The speaker will come in handy there. The BenQ projector has a pair of stereo audio inputs, and one stereo output as well, so you can, for example run a cable from the projector, to a nice boom box, or other portable solution if you want to move the projector from room to room, take on vacation, etc. Or, just get by with the single speaker.
High performance Lamp, Lens, and Color Wheel
In trying to figure out the differences between this BenQ W1000 home projector, and the similar Vivitek, a lot of it comes down to these three differences.
The BenQ's lamp is only 180 watts, compared to a 230 watt in the Vivitek.
The Color wheel is 6 segment and 2x, compared to 5 segment, 3x
The lens has a slightly longer throw, and more lens offset.
So, how do these three factors affect the projectors?
The BenQ measured almost 20% brighter - figure some of that comes from the slower 2x color wheel, - the faster the wheels, in general, the less bright. Some probably comes from the different optics, as BenQ indicates that.
This is despite the dimmer lamp. Ultimately, though, regardless of the reason, the BenQ is definitely brighter. Offsetting that advantage is the Vivitek's higher wattage lamp, and higher contrast ratio (which may well be tied to the color wheel?)
There are color differences as well (discussed later) which also tie to the color wheel, and possibly image processing in general.