Remember that color-accuracy isn't the only visual difference between the 1070 and the 131, and the main advantage of the 131 (high black&white contrast when brilliantcolor is set high) comes with caveats.
The interscene contrast and gamma are what gives that nice natural 3D look which keeps the image from looking flat. The 131 with brilliantcolor set really low has a contrast ratio around 700:1 while setting BC really high can increase the black&white contrast all the way up to about 1800:1 which is excellent and totally on-par with a professional cinema 3chip DLP. However, the higher you boost brilliantcolor, not only do colors become unbalanced but there can be a noticeable increase in pixelation, false grain, and banding. The trick is finding a setting somewhere in the middle where you can enjoy a nice contrast boost but don't have enough inaccuracies, grain, or banding to be bothered by any of it.
The 1070 with BC set off has a contrast ratio around 1400:1 while turning BC on (it only goes on/off) will increase contrast up near 1700:1. The BC setting on the 1070 doesn't add artifacts but it does cause colors to become less properly balanced so the contrast increase still comes at a price and it won't quite match the 131 for black&white contrast. It will beat the 131 by about 2X with full-color contrast but that won't be as noticeable during very dark scenes.
In dark scenes, the 131 is capable of a contrast advantage over the 1070 as long as brilliantcolor is set high. With more colorful content or when brilliantcolor is set lower, the 1070 will have a contrast advantage over the 131.
The 131 will always have a fan-noise and price advantage over the 1070. The 1070 will always have a video-artifact, brightess and color-accuracy advantage over the 131.
Both projectors also feature intelligent lamp-dimming as well as several gamma presets that can both be used to increase the sense of image-depth for 2D video. I don't personally care for the lamp-dimming on either model as the 131's caused mono-blocking and some posterization while the 1070's flickered during certain scenes and cranks the fan-noise up loud. I favored the 1070's gamma settings as they were more plentiful and in smaller graduations, but the 131 has at least one smooth, accurate preset and one brighter yet not garish preset..and both projectors offered a harsh looking "S"/"graphic" gamma setting for those that prefer that kind of look.
For bright lit rooms or for increased perception of contrast during dark scenes, turning the 131's gamma to "video" or the 1070's gamma to 2.0 can provide a nice boost.
Older or non-updated w1070's aren't as accurate out-of-the-box as new ones or those running one of the last two firmware versions.
Either projector should have its brightness and then contrast set properly by eye before making any real judgements. If you or someone you know is complaining about video looking too shiny, overexposed, dark, or flat..setting brightness then contrast only takes half a minute. Be good to your friend or good to yourself.