If I want a fast quality harvest of a grade buds then critical+ is my go to lady. I've had harvests in 45-55 days and I run 4 plants per 600w hps. With critical I do a 7-8 week veg and say 45-55 days bloom. Typical yield is 18-25oz from seed. If I focused more on the bigger yielding phenotypes and tool cuttings then the yield could be over 28oz/light.
Now if you want a+ grade buds then yes moby dick is a great choice. Full of flavour and a great high, the same with other longer floweing strains. Imo if your a good grower and want fast big yield then critical, if you want a more coniseur smoke and have the added 3-4 weeks bloom then moby
Either way they are both great strains
If you need anymore info just shout mate
All the best
D-M.