The sight window on the 54" Stealth is larger than his 52" KS. As with all custom bows, you can request a larger sight window but riser length will determine just how large it will be on the different models.
I personally agree with Gordon, I love the Stealth's feel and performance. It really sends an arrow down range at good speed, both aluminum and carbon. Add that's it super smooth with the regular limbs, for me, no better bow out there.
However, there is a large Kwyk Styk following which tells you something....
All comes down to personal preference.