Vixen ED100Sf vs. Megrez 90

I would appreciate any thoughts on a comparison between the Vixen ED100sf vs the WO Megrez 90. As I understand, both are doublets with an element of FPL-53 glass. There are clear differences: the extra 10 mm fl of the Vixen, the 900 mm F/9 of the Vixen vs. the 621 mm F/6.9 of the Megrez. My interests are both lunar/planetary and deep space, with expectations of doing some astrophotography. Because the pricing is roughly equal, does one standout over the other? Just to eliminate one inequality: it isn't necessary that the scope be a grab-and-go.

Thanks for your thoughts on this.

JWR

Coulter 10" Dobsonian
ETX-90
WO 66mm Zenithstar Petzval

>>>I would appreciate any thoughts on a comparison between the Vixen ED100sf vs the WO Megrez 90. As I understand, both are doublets with an element of FPL-53 glass. There are clear differences: the extra 10 mm fl of the Vixen, the 900 mm F/9 of the Vixen vs. the 621 mm F/6.9 of the Megrez.
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If size/portability is not an issue, the long tube is not an issue, if field of view is not an issue, and if the two speed focuser and attractive construction of the Megrez are not an issue, then the ED-100SF or Orion ED-100 would probably be your choice.

jon