I recently rediscovered Rotosound nickels and have been enjoying them on my Jazz. This got me thinking - I want to give the Swing 66 Steels another shot. My question is tension/flex. I used Prosteels back in the day all the time and I know they're similar to the Rotos but I can't remember how much tension either string has. If someone who has experience of both could help me with how both strings feel in tension and flexibility then it would be much appreciated.