Jupiter is the Solana swap aggregator that most apps, NAVI included, route through, so the price you get is usually close wherever you swap. The front ends differ in what they show you before you confirm, and that is where the real choice is.
NAVI finds the best route across Jupiter, Raydium, Orca and Meteora, so you get the cheapest route it finds, and it shows the token's rug check and risk score before you confirm. It charges a standard swap fee, 0.25% per swap or 0.20% on Pro, shown in the quote, the same kind of fee every terminal charges. You swap the best route NAVI finds with the risk check in the same place you trade. High-risk tokens on NAVI can only be swapped against SOL or USDC.