SP sponge v Inverted sponge?

says Xxxxxz
says Xxxxxz
Member
Jan 2015
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Seems to be a trend with the more modern (more spinny) short pimples having softer sponge compared to modern inverted rubbers.I’m curious as to why the trend seems to be almost exclusively in the direction of softer sponges which – to me – seem to lack power compared to the much firmer sponges used on modern inverted rubber. Modern inverted rubber, meanwhile, seems to be going in the opposite direction with harder and harder sponges being produced. Is there a reason for this? Just as an example the Butterfly Impartial XS is a modern spinny SP…but it uses a soft sponge compared to the likes of the tenergy or dignics sponges. I think I’m right in saying that even the tenergy FX sponges are firmer than the standard sponge of the Impartial XS. Is there a reason why the sponge technology used in the modern inverted rubbers doesn’t ever seem to be used for modern SP's?
 
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