Synapse X or Protosmasher?

Synapse.
I looked at several reviews and it looks the best. Can't you test both of them and come up with a conclusion?

I own 2 copies of each, (1 for myself and one for my son)
They are both good exploits capable of running all the scripts I've ever thrown at them but both also have some short comings.

I prefer Synapse, but I bought it before it went to Syn X which is now a monthly subscription (15 bucks a month). This would be great for someone who just wanted to try it out or knows they will tire of
exploiting Roblox in a short time. Otherwise it sucks ass because that monthly sub will add up in no time.

Synapse *typically* is more reliable for updating quickly when Roblox does its weekly patching to get rid of exploiters. I say typically because there was a long stretch where the dev was having personal issues and
was not very transparent about what was going on, leaving us hanging thinking it had been discontinued. That has since been resolved and all is back to normal.

Protosmasher is also a very capable exploit that does all I need it to do and evidentally much more. I don't use all the features but from what I read there are many for people more capable than me. I just run regular scripts and dont write my own or fiddle with all the settings.
At one time, the dev was very sketchy about doing the weekly updates and was unreliable about it...he finally seems to have gotten his shit together and it updates within a day or 2 now.

Although I keep Proto around as a backup just in case Synapes is down, I really like Synapse better, but unless the monthly subscription thing is something that appeals to you, that part would be a deal breaker for me as I play roblox a lot and know I will be playing for a long time to come.

Customer Support for both is abysmal as it is a bunch of 15 year olds who are more interested in a popularity contest rather than helping customers.
Another option to look into that people rave about is Vinysha (sp?)

TLDR...
Synapse is better but in the long run will cost more due to new subscription policy
Protosmasher is great too, no subscription, but the dev has been known in the past to not update for long stretches...lately that has not been a problem. Time will tell if this continues.

Hope this helps you with your decision