AAdvantage MileUp Mastercard vs AAdvantage Platinum Select World Elite Mastercard

Every figure below is from the same dataset Miles computes its recommendations from. Rows the two cards agree on are collapsed at the bottom.

Economics

Dollar figures are per year unless the row says otherwise. Ongoing annual value is Miles' estimate of what the card adds per year after its annual fee: statement credits discounted for realistic use, benefits, and earning above a strong flat-rate card on a typical spending profile. First-year value is a separate net figure that includes the welcome bonus. A welcome bonus shown at its advertised maximum may not be available to every applicant; that figure is not marked as stronger. ★ marks the stronger comparable figure on other rows, and no row is marked when either figure is unknown.
Figure	AAdvantage MileUp Mastercard Citi	AAdvantage Platinum Select World Elite Mastercard Citi
Annual fee	Best: $0 $99/yr less	$99
Ongoing annual value, after fee	Best: $118 $29/yr more	$89
First-year value	$355	Best: $1,147 $792/yr more
Foreign transaction fee	3%	Best: None
Authorized user fee	—Unknown	—Unknown

Sign-up Bonus

The current welcome offer as recorded in the dataset. No winner is marked: a bonus is points times a valuation times a spend requirement you may or may not clear, and the first-year value above already prices it.
Offer	AAdvantage MileUp Mastercard Citi	AAdvantage Platinum Select World Elite Mastercard Citi
Current offer	15K AA miles + a $100 statement credit after $500 spend in the first 3 months + $100 cash back	80K miles after $3.5K spend in first 4 months, $0 introductory annual fee for the first year

Earning

Percentages are the return on a dollar spent: the multiplier times what Miles values those points at. ★ marks the higher return on a row. Categories only one card earns a bonus on are marked for that card; the other earns its base rate.
Category	AAdvantage MileUp Mastercard Citi	AAdvantage Platinum Select World Elite Mastercard Citi
Dining	—Unknown	Best: 2X2.8%
Gas Stations	—Unknown	Best: 2X2.8%
Grocery Stores	Best: 2X2.8%	—Unknown

Benefits

Statement credits, lounge access and elite status as listed in the dataset; protections are counted, not listed. No winner is marked: twelve small credits are not more than two large ones, and the row that prices them, ongoing annual value, is under Economics.
Benefit	AAdvantage MileUp Mastercard Citi	AAdvantage Platinum Select World Elite Mastercard Citi
Statement credits	—Unknown	Turo: $30 (Per Use)
Lounge access	—Unknown	—Unknown
Elite status	American AAdvantage	American AAdvantage
Protections	2	2

The same on both cards (6)

Rows where both cards state the same figure or the same earning rate. Nothing is marked, because there is no stronger side.
Fact	AAdvantage MileUp Mastercard	AAdvantage Platinum Select World Elite Mastercard
Issuer	Citi	Citi
Rewards currency	American AAdvantage	American AAdvantage
Card type	Personal	Personal
Network	Mastercard	Mastercard
All other purchases	1X1.4%	1X1.4%
American Airlines purchases	2X2.8%	2X2.8%

Which one is right for you

This page shows the difference. It does not pick: the winner depends on what you spend and what you already hold, and adding these figures up without knowing that would be a guess dressed as a verdict. Ask Miles and it computes the answer against your own wallet.

Ask Miles which to get