The Merc's wheelbase is 29 mm longer, and that's the biggest numerical difference. (paultan.org)
As there are far more pharmacy techs than sterile processing techs — 353,340 versus 50,230 as of 2012, according to the BLS — this translates into a significant numerical difference in new jobs. (work.chron.com)
When you split it out like you did TF, the numerical difference isn't nearly as stark... but I think the conclusion is even more apparent than when everything was lumped together. (sbnation.com)