I have been playing with Babolat Tonic 16 the last 6 months. And I want to try out of curiosity two soft poly strings. I have narrowed down my options to these 2 strings. The racquets I am going to get them strung with are K Six One 95 18 x 20 and Pro Staff 6.0 original 95 16 x 18. The Head sonic pro has the double price almost compared to msv according to TW europe pricelist. I'd like to know which of the two is the softest. The flexibility rates and figures show the Head Sonic Pro as more comfortable. IS it so? I don't want to buy both as I am thinking of experimenting maybe with 16 and 17g of the same string. Having in mind the racquets I mentioned above and that playing style is mainly from baseline which of the two would oyu recommend? Thank you.