hmm
So I've been told by an Ortofon retailer (he only sells Ortofon and Shure products), that the differences between the Ortofon pro and Shure is the record wearing.
As the Shure has a higher output voltage, it seems to wear out records far more quickly than any Ortofon, even when set with lower tracking levels.
He only recommends the Ortofon Pro NC cart. for use professionally (apparently the record wear is quite bad with NC's), for home use he recommends the Ortofon DJ or Standard Pro series, as these have remarkabley lower record wear than the NC cart.
We all know though, if you are a scratch type DJ, that your records are going to wear out alot sooner than a traditional mixer, due to going over the same area of the plate time-and-time again.
And believe me when I say, you will only notice a marked difference between the Shure and Ortofon, when you have an Audiophiles equipment. During club use, you wouldn't be able to tell the difference in quality.
I know I can tell the difference with my equipment between the 2 types - but you should choose your needle for the performance you want.
Sometimes this is a trade-off situation. Maybe someone can design an intermediate needle which sounds great and tracks brilliantly.
My suggestion : Try a Tonar Banana needle, I used to use these when I scratched (Old-skool and Jungle), and they outperformed any other needle I tried.
I think these are made by Ortofon, but sold under a diff. name.
They always tracked well and sounded Mint.!