A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
Yes, details matter, especially for this question as the miles or points of *most* partners cannot be used to upgrade a DL flight, with some exceptions for FULL FARE COACH tickets (generally Y class) through the SkyTeam upgrade awards program (but not all SkyTeam members participate in this).