I've got an 3 night award stay coming up in Cologne and I'm debating between the Cologne Marriott (cat 7) or the Cologne Courtyard (cat 4.) That's a 45,000 point difference. How do the two hotels compare? (I've seen threads on the Marriott but not comparing the two properties.) Is the Cologne Marriott worth that many more points? Which is better located? I'll be by myself if that matters. Thanks!