This best ting to do is Call Jon T at the store and discuss it with him... He loves the Widow Maker Ul...
I have two of them and they are Very different from the std. If winds are Sssoo low I go for my Ocius Sul... But I usually fly my Widow Maker Ul ... When the wind is up around 6mph-7mph..
I usually change kites to Std. There is a sense of "pull" I perfer so I changed kites to maintain the same same.
The Std will also fly at low winds. 3 mph not a problem... You adjust the bridle and your ready to go...
I am not so sure all kites go through the Testing that Jon Trennopohl puts his kites through... If you have never talked to Jon or met him you've missed a good moment in your kite life. He backs what he builds.
Truth said it's one of the top three kites on the market ... The cost is cheap compared to the others and Fly's just as Good or Better.
Besides if your like me and can't do every trick what difference does it make...

The Solus and Widow Maker are Two 2 to too different Kites and fly with 2 two too to different inputs .. The Solus is larger. The input is different... Can't fly it like a Widow Maker inputs or Ocius inputs... Won't do it. She'll teach you if you let her ....
I have 2 sets of Widow Makers and am planning on another new Ultra Lite for a color change ... Jon has been building Widow Makers for how many years now
You mentioned the kite felt floaty ..sure bridle was set up for the right wind

Means a lot ...
You won't go wrong with the Std. You'll be surprised at how it acts in low wind. One day I set up wrong kite. Flew all day in low wind... turned out to be my Standard Widow Maker ...
p.s.- How Often do you see

Widow Makers in the Swap for sale

If so they are not because of performance.