hey, what do you mean by EAN number?  Like the barcode? from the TP-Link website, the TL-MR6400 V1 has the detachable LTE antenna, while Archer MR400 V1 has the internal antenna; for Archer MR400 V3/V1, there are 2 Detachable 4G LTE Antennas; 

meanwhile, compared to TL-MR6400 (300Mbps), the Archer MR400 is AC1200, which is more powerful than the former one. 

Hi.

Yes. It is the barcode on the box. 

I would like to get a same or better 4g lte reception, than MR6400 v1.

The reason I will buy a new one, is my MR6400 don't work with IKEV2/ipsec, I can use a beta firmware, but the firmware is not so stable.

I have tried mr400v2 and mr600, but the 4g download and upload are only the half of speed, comparet to mr6400

The wifi speed is not important, I use ethernet.

Best regards

Carsten