Depends what you want... Do you need to pick your colours?
Depends when you need it. If you found one in stock good for you.
The engine is the same. They drive the same.
Do you need any of these things?
• Remote Smart Parking Assist
• Premium projector LED headlights
• 10.25" colour touch-screen with wired Apple CarPlay™Δ and Android Auto™◊ and navigation system - compared to the 8". See below. The Luxury would give you wireless AA/CP with smaller screen. Ultimate is larger, but wired only, then also includes onboard maps / dual screen mode
• Driver’s Integrated Memory System (seat only)
• 8-way power-adjustable front passenger’s seat
• Personalized user profile settings
• Interior ambient lighting (64 colours)
• Surround view monitor (360 camera)
• Blind View Monitor (lane change camera)
• Highway Driving Assist
• Parking Distance Warning — Forward/Reverse
• Parking Collision-Avoidance Assist — Reverse