First, it will achieve higher powers on the moon, sun and planets than any short tube refractor. The 90mm is especially compact, and makes a superb travel scope when space is at a premium. For wide angle day or night use, sweeping the milky way, and ease of use of finding objects, get the short tube refractor. For ultimate compactness and high powers on the planets and the moon, buy the mak-cass. Well, it is subjective, but to me, the max power the 90mm or 100mm refractor would give you on the moon would be around 100X, while the 90mm Mak-Cass should give you close to 200X on the moon.
First picture is taken on it's side, second picture from the bottom looking in.
I have a new product I am planning to carry from Nova-Astornomics called the MicroGuider, version 5. Click here to go to the Nova-Astronomics page. MicorGuider 5 is a unit for controlling digital setting circles. Telescopes For up to date prices. Click on images above for larger picture.