Channels versus destinations
Both platforms cap how many places you can broadcast to at once, and both count a connected account as one unit. The gap is how many you get for the money: Restream's $19 Standard allows 3, its $49 Professional allows 5. CastNest's $19.99 Starter allows 6, and $49.99 Growth allows 10. If your reason for buying is breadth of simultaneous distribution, that ratio is the number to weigh.