At $229 or less per pair on sale - you may find the opinions mixed in favor of the calf. Ask any AE manager about the numbers of calf sold opposed to shell. The calf is going to give almost immediate more comfortable fit to most folks, even though shell owners may find the comfort of a new shell for them is almost immediate. But moreover, the leathers are different - and there is no question about how the choice of a comfortable leather will reflect on comfort.
For the care and feeding of calf, just make sure they are maintained regular for that near-new out-of-the-box look.
(My personal opinion, not representative of all views here)