(First, Agree with above that condition of your SME is of paramount importance, and a lesser arm in perfect condition may well be an improvement on a battered older arm. All relative there.)
Things to think of vis a vis Schick / SME...:
Sme has at least fifty years as a major corporate practitioner of specialty audio in this particular question.
Sme developed the 3oox series to support the Spu, in the late fifties. They've been improving and optimizing it all these years. http://www.stereophile.com/news/110606ara
Schick surfaced as a diy practitioner about ten yrs back and by now has had phenomenal success.
If there was doubt as to the deeper resources of R&D as well as test facilities, I think you need to tip that to SME. As far as which may be the more 'inspired' design or other unmeasureables, I think you may have to go with your own impression.
Spanning the golden era of Lp usage, Sme has made tonearms in the tens of thousands. But they are an industrial concern whereas Schick does handmade arms.
Disclosure: I'm an Sme owner, and have owned several of their arms over the years. If I were looking to find a more 'independent' style tonearm designer I'd look toward Franz Kuzma, who is known for extensive R&D and testing.
Sme is a Major Player in analog audio. Mr Schick is his own phenomenon.