Hi TelmoF, in my experience, the Honda Shop Manual is way more comprehensive. However, they are both fairly affordable, so you could purchase both. Stick to the Honda OEM if you can only have one. Hope it helps. Cheers.
Just an FYI for those in NA. The Helm manual is the authorized print of the official Honda Service Manual 61MKN00 for the CBR650R/RA and CB650R/RA
62MKN00 is a companion shop manual which as I understand is not quite as comprehensive as the 61 version, but still valued information just the same. Honda actually recommends owning both, but the 61 version is all you may really need.