More Literary Fun with Spam

One of these is from the first page of Finnegans Wake; one is spam. Can you tell the difference?

A. If penultimate, not preempt. Some sandburg slippery, rejuvenating. Some loam. Seamen on state. A snake, a columbine: try bicarbonate, see, despise. Hereabout some fickle, gargantuan, but concave and systematic, may be troublesome or autocratic. A gentleman may creep through the oasis footwear on tobago, on jumble and slosh, view on glow or lawgiving realisable. Some easygoing, in moist reuben. Moliere?

B. Rot a peck of pa's malt had Jhem or Shen brewed by arclight and rory end to the regginbrow was to be seen ringsome on the aquaface. The fall(bababadalgharaghtakamminarronn-konnbronntonnerronntuonnthunntrovarrhoun-awnskawntoohoohoordenenthurnuk!) of a once wallstrait oldparr is retaled early in bed and later on life down through all christian minstrelsy.