Greetings! Please forgive what may be a repetitive subject, but I hope to spawn a conversation comparing the life of a very frequent flyer on AA vs DL. I'm well-versed in the key take-way differences between the two programs (i.e. value of RDMs and SWUs) but instead am looking for a deeper exploration of experiences -- namely that of a Delta DM vs an AA EXP. Note, I'm not interested in discussing the ease of redeeming AA miles vs. DL SkyMiles. I get it. This is largely why I decided to start a new thread -- I'd like to preemptively table that discussion and focus on other tangibles. I've been a NYC-based Platinum Medallion on DL for the last two years and am now a Diamond on the airline. I'm an avid reader of FlyerTalk, MilePoint, and various blogs, and know the DL experience and route-system inside and out. In August, I took a new role in my company which has me significantly increasing my travel. What was once about 50-60K BIS/year has become 150-200K BIS as I gallivant across the country each week (about 50% west coast travel, 25% south east and 25% midwest.) Now, I'm told that my role might expand to world wide, and on that notion, I'm thinking about adding AA to the mix for the significantly easier to use SWUs (compared to DL.) It's been years since I've flown AA in coach or business, and I'm wondering what the experience is like these days. For instance, for those who've flown domestic first and international business on both AA and DL in recent years, what are the strengths and weaknesses of each airlines' hard and soft product? I've read a bit about AA's modernization program, and I like where it's going (similar to DL's which is several years in progress,) but what's the timeline for roll-out? Also, assuming I make EXP, what would the upgrade experience be in comparison to that of a DL DM? Unfortunately I seldom have the luxury of knowing my work travel well in advance, so am often buying close-in/high-fares. My understanding is that AA prioritizes ticketing time over fare class on upgrade lists (within a status range.) If so, would this negatively impact my chance of upgrades as an EXP? On a similar note, what are EXPs' general experience (disregarding the recent labor unrest issues,) with IRROPS and same day flight-change flexibility. Delta's same-day-confirmed (SDC) program is free for mid and high-tier elites, and is very useful. I understand Confirmed-Flight-Change (CFC) isn't... Is this an issue for EXP's or are there other ways to accommodate flexibly day-of-departure scheduling? I understand I'm asking a lot of questions... My intent is to simply setup a dialog and have them guide the conversation. Thank you in advance for chiming in with your experiences and opinions. They are greatly appreciated!