WO FLT 110mm vs Tak 106mm FSQ

does anyone have any comparisons between the william optics flt 110mm vs the tak fsq 106 or tak 102. i am looking for any reference of comparisons. i couldn't find anything recent in the forums. i know s&t had an article on the flt 110mm which reported some image shift. i would like to try some astro with a 300d and am thinking about a 4in refractor. does the extra cash justify the fsq or flt over the tak 102 for astrophotography? can a gm8 hold one of these scopes for astrophotography or am i pushing it? thanks dan