Chase Sapphire Reserve vs Preferred: which one is best for me as a frequent traveler?

Summary

I know this is very subjective, but I could use some insight from people who use these cards and are similar to me. I travel a lot (in 2025 alone I logged 29 flights, 12 of those being long-haul (8+ hours). This is pretty typical. I'm American but spend most of the year in South Africa and regularly fly to Europe, Asia, and the U.S., though I also do a lot of shorter flights in southern Africa or within the US/Europe. I'm mostly interested in accruing points to get upgrades to business c

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