I have both OEM and softseal. The OEM stuff is EXCEEDINGLY expensive! I checked with Kirban last week and the roof rail (around the windows) was about $449!
The softseal stuff I bought was about $150 or so for roof rails and the strips around the doors.
As noted above, the ends of the pieces do not have a plastic insert and Are prone to ripping.
As for the the construction, the softseal stuff is substantially harder to the touch than the OE stuff except in the upper corner of the window (the 90 degree angle)
Adjusting the windows is a PITA either way and both of mine still have some wind noise at some speed or another. While I have spent considerable amount of time adjusting and readjusting (and I have the book too), it never seems to get to 100% perfect. Then again, after a certain amount of time I start experiencing the law of diminishing returns and increasing adult beverages

and well, you know the rest.
If I had lots of cash to spend and was wrking on a show car, I'd go for the OE but for the price of the SS stuff it's not SO horrible.
BTW, I have not tried the 1A stuff yet...