Never under any circumstances get a JT Splatmaster.
This aside, both the i4 and the profits are a SOLID buy. I have used both in all field conditions, from 20 degrees wearing a hoodie to 98 degrees and sweating my ass off. Neither have EVER fogged on me. The major difference is the profit has a slightly better FoV and is very comfortable but by design they can get really warm. The i4's are smaller but they fit very snug on your face and are very well vented.
Bro, we're just having fun, and you're somone who apparently takes using a shits n giggles gun too seriously. Id use it, hell I bought one for my brother (new jt splatmaster kids only field at disruptive) and he loves it.
Jurzy could easily bring out better guns too.
My roomate and I use them in our appartment when we can't get to the field because of work. Best investment ever.