I found a website that addresses race stock skis. Here is the part where a person asked a question about buying race stock skis.
"Q: Race stock?
First let me say that I love reading all the articles . My question is related to race stock skis . First , are the race stock skis of last year just the stock version of the same ski this year or are race stock skis a different ski all together . I have a chance to buy a pair of p40f1s race stock or the new p50 f1 stock and just cant pick . I would assume that the race stocks are better but I dont know Volkl that well .
Race stock skis, although they often sport the same graphics as retail models, aren’t always the same ski sold to consumers. They are not necessarily a better product than those on the racks in your ski shop. Most race stock skis are designed to do one thing very well – either short or long radius turns in gates – but they tend to suck at other types of skiing.
Nor do they tend to be as durable. Most race stock skis are not built to last many trips down the race course. Therefore, most race stock skis carry no warrantee. We’d probably go with the retail P50 were we you."