The difference is, there are no good places to farm the gems you need for high end JC (uncuts, raws, etc). For silks and pelts, they drop on certain mob types, so you can restrict yourself to those types. That speeds it up considerably.
Tatankaa (95 Inquis)/Urkell (38 Conj)/ Seanthornton (24 Pally), <Inisfree> Freeport server
Tatanka Wolfdancer, 103 Wood Elf Druid, 7 x 300 Master Artisan
Anaceup Mysleeves, 103 Erudite Mage, 2 x 300 Master Artisan
Snookims Whinslow, 103 Erudite Enchanter, 2 x 300 Master Artisan
<Inisfree>, Tunare (Seventh Hammer!)