Re: Any casting differences between WF and DT lines?
I have cast Weight Forward or Rocket Taper, and Double Taper lines as well as Level lines. I would tell a beginner to buy / use a DT line for the simple purpose of not confusing that person. After the person had become proficient at casting and familiar with the feel of DT line I would say that they could then buy / use different line designs and find what suits their style or rod best.
I cast about the same with any line, of course there are subtle differences but I often believe we do too much hair splitting. Heck, I remember when level or DT were all the sporting goods stores had. You had to look for or order a Rocket Taper line. For the readers under 40, Rocket taper was what WF lines were called in the late 60's - about 1983 or so. At least where I lived in North Central PA.