Spring's advantage is volume: more buyers are actively looking after winter, which tends to mean more showings and a shorter path to an accepted offer for a correctly priced home, particularly with the market currently reading 1.63 months of supply.
Winter is not a dead season, only a quieter one. Buyers who are shopping in winter are often more motivated, since fewer people list a home over the holidays without a real reason to move, so a well-presented winter listing can face less competition rather than less interest.
The better question than which month is whether your specific home and reason for selling actually align with waiting. Get your hand-reviewed valuation from Joel Dyck.