You are comparing the depreciation expenses of two major automotive companies, Ford Motor Company and Toyota Motor Corporation, for the fiscal year 2023.

Requirements:

1. Ford reported depreciation expenses of $4 billion for the fiscal year 2023. Toyota reported depreciation expenses of $3.5 billion during the same period.
2. Calculate the difference in depreciation expenses between Ford and Toyota.
3. Analyze and discuss the impact of depreciation expenses on the profitability and asset management strategies of both companies.