Yes, that's it... and also total "unsurmountable" ;-) difference to hybrids, for ages, and the eternity...
Edit: I'm not really serious, sorry ;-) Let me explain... Like you, I felt in love to the response from the dense sponge. But as you know, it's double edged sword, it really only works well for say 3-4 weeks after b... And even when it works optimal, it does feel different. We love it, but other people, many many in my area, turn the head around and suggest faster rubbers... It does have a sub-conscious, well, actually conscious ;-) impact on me... I do think about alternatives... Last year actually only two (oh, development), the Tronix ZGR and this rubber, the C55... And the review is so great that I tend to the C55 now... we should all charge
@doppelmoral