Ok my real experience because I owned both X50 ver5 s7, and the 6.1 ,m4 I think it was...
The 6.1 was half as chatty as the s7 ver5 when driving thru a door crazy shopping center...
When I got the ver5 it was so much more livlier and goes off on everything...Cant speak for the 2 laser sensitivity of the two ...I hear the newer versions are better on laser though...
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