There's a big difference in psychology. Although it's only a rule of thumb, the best VP of sales can be a bit more introverted and detail-oriented than the salespeople they manage, who can be more outgoing, high-perseverence, cold calling types.

VP sales has to manage revenue pipelines, analyze sales reports, detect account losses, manage promotions, get involved in contract negotiations, etc.

Salespeople network, originate leads, cold call companies, build relationships, close deals, etc.

The best salespeople often make terrible VP sales.