Buying in Varsity View before your current house sells means carrying two mortgages at once, even briefly, and that carrying cost adds up fast if your existing home takes longer to sell than you planned.
Selling first usually means a short gap between possession dates, bridged with a flexible closing, a rental, or family arrangements for a few weeks, which is an inconvenience rather than a financial risk.
The exception is a specific Varsity View home you genuinely cannot risk losing, in which case a bridge loan through your lender and lawyer can work, at a real interest cost. Get your hand-reviewed valuation from Joel Dyck.