To be really honest with you, I wouldn't even care about any of the "accessories" they spruke, My poor old SW Dob that has been converted basically only retains the SW Primary, White tube, front tube ring and the white OTA. everything else has been turned out and replaced. As for quality, they are both mass produced Asian scopes, as such they are pretty much the same bar the mirror substrate (pyrex is better than BK7 due to thermal expansion).
Im even thinking of replacing the mirror
Just for some information the F4 needs a larger secondary just by props. it would be interesting to do a ray trace on it to see if the difference in size is actually geared towards 25-30mm full illumination. My original secondary was 58mm which is geared for visual, it now has a 70mm.
The other thing that people have got wrong is the SW is not F5, its 4.7
although just a bit over half a F stop
it won't make a huge amount of difference in light capture but you do have to take into consideration if you want large fields of view or smaller but more detailed fields of view eg... what do you want to take photos of!
If you want to see the FOV for a 10" mirror and KAF 8300 chipset have a look at my website. and unless you can find a F4 10" with the same kind of chip then they wont give you a representative indication on FOV
thats my thoughts