I'm not so sure about that. The 1500 is the equivalent race run at major championships (and most paced time trials). But that record (3:26.00 by Hicham El Guerrouj) has stood one year longer, and is generally considered a stronger record. This is possibly the closest anyone's ever come to an equivalent performance to the 1500 record, in either the mile or the 1500. The second-fastest 1500m time ever is 3:26.34 by Bernard Lagat in 2001. The World Athletics scoring tables value a 3:42.66 at about 3:26.3, eyeballing the midpoint of given values. (Or taking the WA point values on the top lists, Josh Kerr's new mile record is 1298, Lagat's second-best 1500m is 1297, and El Guerrouj's 3:26.00 is 1302.)
I don't know whether the WA points or other conversion methods actually have small enough error bars to distinguish between the Lagat and Kerr performances, but the 1500 record beats the mile record by a big enough margin that I don't think we need to worry about that.
https://worldathletics.org/records/all-time-toplists/middlel...
https://worldathletics.org/records/all-time-toplists/middlel...