Motors for Turbo Ace Matrix

[jetkrazee]

Hi gang, has anyone in here had any experience with using the T-Motor U-POWER U5 400KV 3-8S brushless high efficiency motors or the Sunny Sky V4010-14 375kv motors? I have heard two different opinions as to which motor is used on the relatively new Matrix-i quadcopter to achieve an advertised "48 minutes of flight.

Thanks in advance for your input