You asked for a comparison from those who have had both... I have had both, and can incude a Habu Death Adder into the equation also.
Having owned 7 widows in the past including 4 with reverse mounted limbs, they were great shooters, stable, hit where I was looking. However, I could never be happy with the "Mass" and physical weight of the risers and found the performance less than anticipated..
I then went to a Habu "Death Adder", a 3 pc. with reverse mounted L/B limbs... It was an older, and now out of production bow.. It was light in weight [ way lighter than the widows] about the same performance wise, and with the skins it was wearing, I felt much prettier.
Eventually a 60" 58# Kwyk Styk with standard recurve limbs came available as a trade option for the Habu.
Not to mention, I was extremely happy to pay the price, as I had been waiting for that particular bow to become available to me for some time.
Bottom line.... all of those Widow's live at new addresses and have for some time... The Kwyk Styks have a permanent zip code of 98629 and don't plan on moving soon.
The only thing which would change that would be if I start having additional health issues. :(
Gene