Comparison: easchatz recipe brewed twice, first batch using WLP051 and second batch using Nottingham.
Conclusion:
The Nottingham makes a drier, crisper, thinner beer. The WLP051 seems to have more body and slightly sweeter. My conclusion is that the WPL051 came closer to producing the TH clone then with Notty. Both beers are very good and it comes down to personal taste.
What I have come to focus on is the balance between sweetness and bittering. I like when the bitterness cuts the sweetnes to creat a clean, dry taste. For me Notty cleans up the beer so well that it creates something that is more crisp (less sweet) then WLP051. WLP051 leaves behined a slightly sweeter beer that, for me, is balanced very well by 55 IBU's of Centennial making for a well balanced TH clone.
All that being said the real truth comes out when a second batch produces the exact same beer. I'm brewing again this weekend using WLP051 to see if I can duplicate batch one.