William-Optics 66 apo vs 80 "semi"-apo

As a follow on to my other post ...

For planetary viewing, I know both of these options are definitely limited, but between the two which would you recommend? The 66 apo has a focal length of 460, their 80's either 480 (Zenithstar) or 500 (Megrez).

If the choice were mine, I'd opt for the 80mm Zenithstar. Even if the 66mm apochromat cost $300, I'd choose the 80mm Zenithstar. Sub-three-inch apochromats define a niche that's simply too narrow and "cute" for my tastes. There are plenty of alternatives to a fast 66mm apochromat, many of which are more versatile, will show greater detail, and cost much less. If carry-on portability and wide-angle views are musts, the 80mm Zenithstar, its "twin" the Orion Express, and the Stellarvue Nighthawk (w/rack-&-pinion focuser option) all fit the bill, cost less, and will outperform the 66mm Zenithstar "apo."

Seems the "basic" Megrez is now the 80mm f/7 triplet and costs hundreds more than any of the afore-mentioned scopes.

Best wishes and luck.
-Dan