I've only used the Stren fluoro in 20 lb. I'm not too impressed with it :-( But, I've never had a single problem with it. I think it's just a confidence thing? After hearing a few people talk about it I started to second guess it.
I find myself retying the yo zuri more often due to nicks, (I'm flipping thick dead tullies lately) but the yo zuri seems to be a lot limper and has very little memory? So far I'm happy with the yo zuri and might try a couple different tests?