I've used both and both have broken. They are both awesome, here's why.
I got the OEM bumper first and it held up pretty well until a drop on a set of weights. Phone was fine, not a scratch on it but a few days later the plastic ring around the phone cracked at the bottom. Considering the circumstances I'm glad it broke and not the phone
If i could I'd get another one but last i checked they were still outa stock or going for $55 on Amazon.
When the Poetic Borderline became available I picked one up because it was cheap. Within a week the rubber began to separate from the hard plastic. At first I was a little annoyed but I dropped an email to Poetic after the OEM bumper broke because the Borderline has a 3 year warranty. They informed me that they are aware of this issue and that they'll be getting a fixed batch in tomorrow. They offered a replacement, completely free of charge and even allowed me to to change the color to black from yellow. It was very simple and the only info they needed was the order number and they took care of the rest. Great support.
With respect to which one I prefer. I think I like the feel of the Borderline a little better. It's a tad slimmer and just feels better. Assuming the new batch doesn't fall apart that is. I do prefer the look of the OEM one. I think that if the Borderline came in a matte finish it'd be perfect.
Those are my thoughts.
Sent from my Transformer Prime TF201 using Tapatalk HD