Hi
If credit card touring is your main thing and you've no need to carry more than 17Kg (12Kg on the rear), and money is no object, I'd go for the RST. If you're possibly wanting flexibility ref load carrying (eg camping or carrying your weekly shopping), then the Raven Tour is a safer bet. I understand that the RST has a more responsive frame/set-up than the Raven Tour but in fact is only about 1kg lighter. I use my RST for commuting & summer-time credit card touring and it's perfectly suited to the job.
Fred