Questions about hulls

I'm looking for a second kayak, ad 8 - 10 foot SOT for smaller streams and lakes and got to wondering about who makes better quality hulls: materials and durability, and manufacturing quality, too, I guess.

You get into this stuff and see what are very similar-looking products, with very similar specs, and there can be hundreds of dollars difference in prices.

So are, for example, Perception Sport hulls equal to Ocean Kayak hulls for quality of materials and workmanship?  How about  Wilderness Systems and Emotion Kayaks?  It just boggles the untrained...

I'm not after specific kayak suggestions, but feel free to tell me your opinion(s).  I'm looking for product quality comments.

Appreciate everyone's thoughts on this.

I'm not by any means an expert - some of these guys have sampled tons of boats and I hope they speak up.

We've owned 2 Ocean Kayak brand yaks now and I'm impressed with their plastic. It seems like a happy medium between flexible and hard.

My Wilderness Systems Tarpon is definitely harder than the OK, but it's very old now and it's very possible they're different now. It also split the plastic when a previous owner hung it from his garage ceiling from the handles (which is obviously not a good idea). That said it seems tough enough and has not cracked from normal abuse (just the abnormal hanging).

We've only had our Hobie for 9 months or so. I feel like the plastic is softer than my other boats by a margin. I completely baby my boats and it already has significant scratches. My wild guess is that Hobie makes their plastic softer (in some boats) to combat drive-well cracking. (I have no evidence to support that.) OTOH, a superficial poke at some other Hobies (a Pro-Angler, in particular) at the store leads me to believe some of their boats get harder plastic than others. This is all unscientific conjecture and heresay! 

To be honest I think that most modern plastic kayaks are going to be fairly tough and resistant to normal wear and tear. In other words, if it were me I wouldn't prioritize minor differences in composition very high into my decision-making process.

I guess I mostly addressed "materials" but not so much "workmanship". I have not noticed a huge degree of difference in workmanship between the kayaks I've owned. If I had to pick one I'd probably again give the nod slightly to Ocean Kayak, although I think my Hobie is really well put together.