I am basing this only upon what I have read.
For example, I particularly noted what 'StampR' writes of this Prospec Professional monofilament here on Spey Clave:
Been a Gig Game fan from day 1 till I tried the Berkley Prospec mono about 3 months ago, turnover is much better than the Big Game, pound for pound it has a thinner diameter, slightly stiffer than the Big Game, coiling and tangles are no longer an issue off the reel, I no longer have to stretch before using. I have been using 25lb test on all my SH rods with commando heads and 30lb test on all my DH rods..........Disclaimer, I have no affiliation with the company or product, just my personal experience, your mileage may vary
Used Berkley Big Game for years, till I switched over last year, been testing it now for over a year with excellent results, it has no memory whatsoever, thinner diameter, great visibility especially with the solar yellow, cast like a dream especially with OPST heads, unfortunately only available in bulk spools, so you will have to get the amount you need from tackle stores.
At His Right Hand...
A. M. G. D.