I posted the link to the 302 without knowing which specific vendor it was. But Zephyr11 nailed the differences pretty good. I wasn't implying the SL or 302, that either was better, just that one is steeper discount from an MSRP. I think the SL has been replaced by the TK in the product line per se. SRAM Rockshox in the Tora line seems to have resorted to coiled spring forks. Would be speculation that there is any issue with the air forks ?
http://www.sram.com/rockshox/category/105