been with proofcore for 3 years now, and have not yet tried shiwa so unfortunately will not be able to speak on them.
Proofcore is simply phenomenal. Everything about them. Does not matter if we are speaking on the community of players using their products for SOOOO many different games, to the devs/managers/owners/resellers, the experience is just never bad. The actual cheat itself and features is PERFECT, especially for closet cheating while still be bad ass and having enough great features with easy to understand instructions if you do not happen to be that technical or use computers for a living like i do, it does not matter. O, and let me not forget about the security. I am sure if you have been doing your homework, you have seen that when you sign up for proofcore, in order to buy their products even, you will be submitting a picture of your photo ID/drivers license/passport to them along with a handwritten note and a selfie picture. I am not sure I know of any other provider that requires this...but this is another main talking point on my proofcore is the best. Best of luck.