Matched to UA 1K using Delta Diamond, and on today's UA flight the flight attendant made a point of coming over to say hi, mentioning she saw it was a match from Delta, asking how the experience was going and telling me to find her anytime if I needed anything.
That said, honestly the UA 1K experience is way better than Delta Diamond—pre-boarding + free snacks and drinks in economy + being able to see discounted award tickets. Only shame is Chase never lets me get a card with the 5/24 rule.


It was still a bit unexpected that the flight attendant proactively brought up a status match. But a single experience probably isn't enough to go on—would other routes or lounges be the same way? I'd like to see more people's feedback.