Seems like people are voting for random reasons unrelated to the question. Like preferring the comped rooms at one casino chain over another. Which doesn't matter, since I ignored Total Rewards for a couple years, was only Gold, and yet still got comped rooms based on my past ADT. Same with Mlife, I fell to Pearl and still got my suites comped. So that becomes a moot.Being a higher level at either one does next to nothing for a comped room. Your play matters, not your card. Saying you pick Diamond over Gold since you get more free play is moot as well. Free Play is tied to your ADT, not card level. I've had twice the free play as a TR Gold then my Brother did as a Diamond. My average was that much higher. Same with the resort fees. You could hold a base level card with Mlife and still get an offer without fees at some places. So level doesn't matter there. But all CET rooms require Diamond or better to get those waived. So maybe a wash? Since CET would match Mlife Platinum to Diamond, shouldn't that be the barometer here? Not Mlife Gold? And this thread is about Diamond, not a High Diamond with 25,000 TC's or more. Being Diamond does not get you free grub in the Diamond lounge. The Diamond player that has an extra 10,000 TC on top of the standard 15,000 eats for free. If we are talking Platinum to Diamond 1, I see more value in Platinum. Diamond lines at check-in, the cage or restaurants are usually pretty packed. Seems like more Diamonds walking around then Mlife Platinum. So getting Platinum cuts is a better value to me. Diamond has the free show tickets, and I do not like shows. Platinum has the free experiences, which I would rather do (Shark Reef, Siegfried & Roy, Gallery of Fine Art ETC) so I give a point to Mlife I am only a base Diamond, so it cost me $10 in reward credits to get into the Diamond Lounge. But as an Mlife Platinum I can walk right into the VIP lounge at Luxor, Excalibur, MB and I assume Park MGM has the same rules as the old Monte Carlo and grab a free drink, some candy bars or chips to keep me going for free. So another point for Mlife. I like that being Platinum gives me accelerated earning on points. Points which are already more valuable then TR's reward credits. Yes TR has the bonus point thing. But that is not a benefit of being Diamond. $30 in coin being Diamond gets me 6 cents in reward credits. $30 on a normal Mlife slot gets me 13 cents in express comps AND 13 cents in free play. That is 26 cents in value back vs 6 cents. A Huge win for Mlife for me. Diamond gets me the $100 celebration dinner. But Platinum gets me a free cruise. Point to mlife. Both get free parking & valet in Vegas. So a push there. I just see more value in my Platinum card then Diamond. And a tiny bit more value in being Gold over base Diamond due to the point accrual. I stay 2 nights with Mlife, with a coin-in of $20K total (normal slots, no VP) and I earned $80 in express comps with the bonus earning for that level PLUS $80 in free play. That is $160 back on my points VS $40 in Reward Credits by being Diamond. That immediately offsets the Diamond celebration dinner for me. AND I keep racking up the same better point return with each stay.