Dimension wise, Lightning has much larger Frunk, much larger cabin, much larger bed. The only weak point is shorter (67" vs 72") bed.
If you just want a full size electric truck, Lightning is the one. It has larger battery and real world range is no less than CT.
To my instinct or extremely limited knowledge of bodyshop and stainless steel, it is extremely hard to repair the stainless steel sheet/shell.
Now think about a dent, you can easily fix it using paste, buffering and painting. But how can you fix it with bare stainless stell?
Further more, the...
The table at Electrek should be Wh/km:
Pickup Model/Variant
50 mph
70 mph
Rivian R1T Performance Dual Motor Max Pack (21″)
151 Wh/km
233 Wh/km
Rivian R1T Performance Dual Motor Max Pack (22″)
172 Wh/km
258 Wh/km
Rivian R1T All-Terrain Dual Motor Large Pack (20″)
184 Wh/km
273 Wh/km...