You assume that EXOS series is more reliable. That may or may not be true.
The noise yes, it is higher significantly than most known drives. The drive will also will require better environment conditions for it to properly run. If you just put it on some desk and start/stop it whenever you feel to do so it will most likely not last longer than a WD Red because you will most likely not be able to provide the proper temperature for it (or for a WD Gold just the same).
See below:
The tested EXOS had the SN04 version of firmware. Due to many complains it is possible that in more recent firmware versions noise to be lower.
The Quietest 1TB drive = Western Digital AV-GP 1TB (Noise level 28.2 dB(Active))
The Quietest 2TB drive = Toshiba E300 (Noise level 28.2 dB(Active))
The Quietest 3TB drive = Western Digital Red (Noise level 28.8 dB(Active))
The Quietest 4TB drive = Western Digital Blue (Noise level 28.8 dB(Active))
The Quietest 5TB drive = Western Digital Green (Noise level 33.5 dB(Active))
The Quietest 6TB drive = HGST Ultrastar He6 (Noise level 23.8 dB(Active))
The Quietest 8TB drive = Western Digital Red (Noise level 22.5 dB(Active))
The Quietest 10TB drive = Western Digital Red (Noise level 21.7 dB(Active))
The Quietest 12TB drive = Western Digital Gold (Noise level 23.3 dB(Active))
Seagate EXOS 6TB idle noise = 45 dB
Seagate EXOS 8TB idle noise = 47 dB
So if you want a quiet 6TB get a HGST or WD Red.
If you can assure a data-center-like operating environment then get a WD Gold.
The choice in drives now-days fits in 3 categories: backup, general use and intense use/reliability.
For reliability, the old WD black / RE is now called WD Gold and it's certainly the 1st choice when it comes to long-lasting drives. These are mostly also the top performance ones.
For general use, anything else should be fine: Barracudas, WD blue, red, Firecudas, Red Pro. In my opinion, the old WD color coding was better than today's options; now it can be confusing as we have stuff like Red and Red Pro (same goes for Barracudas standard and Pro).
For backup, WD Greens used to be the best choice, but now both companies release various types of NAS devices that simplify things while offering a large enough variation in choices.
There's also the special use case of video surveillance and purple drives. Here you can used enterprise class drives like WD gold for Video Surveillance systems but it's strongly NOT recommended to use SkyHawks or WD Purples in data centers. The reason for this is that surveillance drives do not offer the guarantee of data integrity, as other drives do. Therefore, storing a large archive on one has a high chance of compromising your data.