Thorowgood T6 or T4 17" or 17.5" cob?

I have one of each one of which is redundant .... lol

I find them fab for my flat back non withered Section D, think its more important to find the right girth! The only one that stops the roll seems to be a genesis which is elasicated slightly all the way through not just at one end.
 
They are pretty much the same, apart from the T6 can feel a bit sweaty in the seat area, if you know what I mean - several people I've spoken to experienced the same. The t4 is stickier.
 
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