[brushfoot]

Personally, yes, the rehash's title is stronger. It tells a story whose ending piques your curiosity to read more.

"Uber Migrates" (beginning: company that I'm interested in does something) "1T records" (middle: that's a lot of records; I wonder what happened) "from DynamoDB to LedgerStore" (hmm, how do they compare?) "to Save $6M Annually" (end: that's a good chunk of change for me, but was it worth it to Uber? Why did it save that amount? Let me read more)

It's a simple and engaging "there and back again" story that paves the way for a sequel.

Versus:

"How LedgerStore Supports Trillions of Indexes at Uber" (ah, okay, a technology supports trillions of indexes. Moving on to the next article in my feed)

"Migrating a Trillion Entries of Uber’s Ledger Data from DynamoDB to LedgerStore" (ah, a big migration. I'm not sure who did it or whether anything interesting came of it, or even whether it happened or is just theoretical because of the gerund, and moving one trillion of something is cool but not something I probably need to read about right now, so let's move on)

YMMV. Some probably prefer the more abstract/less narrative titles, but the first one is more of an attention grabber for me.