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. One off the significant differences between refractors and newtonians is the point spread function (PSF) or the Airy ring structure. The central obstruction in the newt increases the amplitude of the Airy rings at the expense of the central peak. The net result is bigger stars and less planetary detail for for any given aperture.
. If you increase the aperture of your newt 10 or 20 % you'll catch up with the refractor. Also refractors always suffer from chromatic aberration to some degree, unless you spend big bucks. Refractors need collimation, but is done in the factory and holds pretty well as long as you don't overload the focuser. I almost forgot the spikes on the newts stars caused by the spider vanes. .
. You get a lot of bang for your buck with a big newt.
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