I'm pretty sure there are other differences between the 26BH and the SLX26BHW..
With the Elite version, you get the better toilet, skylight in kitchen area, LED lighting. Pretty sure the 26BH(jayflight) has a thicker floor the the SLX(light weight model). Also, pretty sure the outside storage doors are larger on the Jayflight than the ones on the SLX..
Been a couple years since i compared them so things might have changed...
As for Black tank flush, i use mine all the time and works great.
Thermal package with the enclosed underbelly is nice, keeps the trailer both cooler in the summer and warmer in the winter.. the thermal package also gives you better insulation in the walls of the trailer i beleive..
enclosed underbelly also helps keep things clean underneath and harder for rodents to get into trailer...
for me the extra $ spent on my 26BH Jayflight over the SLX was a no brainer..
TT: 2015 Jayco Jayflight 26BH Elite
TV: 2014 Ram 1500 Sport, 5.7 HEMI 3.21, Firestone 1000# air suspension. WD hitch w/800# bars
SOLD: 2012 Jayco J-series 1007