Replied by Emily on Mar 17, 2020
Hi, Dear friend,
XEMQB1 - Super Key , Support ID 48, 48, 4D etc ... is a new version of old NXP wireless key but supporting more transponder due to built in XT27 Super chip.
XSMQB1- Smart key, mostly for MQB (regular and kessy) new 48 AES , also older cars with 48 KESSY (tiguan ,golf 6 etc)
Any questions feel free to contact.