The Home Cinema 2150, as mentioned, has a brightness claim of 2,500 lumens – that’s 300 lumens more than the 2045’s claim of 2,200 lumens. The difference isn’t huge, but should provide a little extra help when dealing with ambient light.
The Home Cinema 2045 beats the Home Cinema 2150 in terms of inputs and connectors. The 2045 has an RCA composite video input, as well as two RCA audio inputs for stereo. It does have one less USB port than the 2150, however – it’s missing the new Mini-USB Service port.
No lens shift on the Home Cinema 2045! This is not surprising, as it is atypical for a projector priced under $1,000 to have this technology. It seems that Epson is being generous with this upgrade to the popular Home Cinema 2045. The 2045 has a zoom ratio of 1.2:1, while the 2150’s is 1.6:1.
The Home Cinema 2045 weighs just under a pound less than the 2150, at 6.9 pounds. This difference is so slight that you’re unlikely to notice. The 2045 has a 5-watt mono speaker and the Home Cinema 2150 has a 10-watt mono speaker. Now, that’s a difference you will pick up on.
What do they have in common? The Home Cinema 2150 and Home Cinema 2045 both have Miracast for streaming from mobile devices. They have full HD resolution, Frame Interpolation, and are 3D capable (shutter glasses). Both are PC and Mac compatible.
So, why should you spend that extra $50? The Home Cinema 2100 has a lower contrast ratio of 35,000:1 –the 2150 has a contrast ratio of 60,000:1. What does that mean? According to Epson - the difference is the 3LCD panels. As readers may know, every 3LCD projector has 3 LCD panels, they are monochromatic, but each gets a different filter: Red, Green, and Blue. Epson explains that the Compensation Filter for the HC2150 panels are richer, and have higher performance than in the HC2100.
The 2100 also lacks Miracast support for streaming from mobile devices such as smart phones and tablets, and is 0.2 pounds lighter.
That’s all. It really comes down to whether or not you think the higher contrast ratio and Miracast feature is important. In any case, with the upgrades given to both these projectors, you can consider them to be a worthwhile upgrade to their predecessors and possibly, the latest addition to your home.