I carry both and pay $450 for the AMEX Plat. & $395 for the DL Reserve - they gave me the price break when I got the Reserve because I already had the true Plat. & I don't know if they still do it, but it's been like that for me for the last 4 years.

Remember, with the Plat. you get $200 per year credit in your designated airline's extra fees (food, EC seats, maybe $50 gift cards, baggage, etc.). You also get the $100 Global Entry application fee reimbursed, plus all the other misc. Plat benefits.

With the DL Reserve, with $60k spend you get 30k MQMs that I value at 10¢ each, and 30k RDMs that I value at 1¢ - 4¢ each.