The difference between the two cards is small, but significant in several ways that can be difficult to discern until you play with both of them, which Ive been doing in Blue Moon for a couple months now
Its the perfect example of a card that most players wont be able to rate effectively until theyve seen a smarter player bring it to a top table and since I havent divined the proper build for it, this spec comes with a giant sized caution label despite the slight potential to be massive in Modern and/or Legacy
Zealous Conscripts It doesnt look like much, but haste is essential for creating infinite combos, and thats why Zealous Conscripts is the best of the threaten effects
One thing that makes Izzet effective, design-wise, is that WotC is almost always aiming at spells-based tempo gameplay with these two colors
If you can find ways to abuse its death trigger, this commander can get you a lot of free spells and deal out a good amount of damage
He left TPCi last year in 2019, and shared this unofficially released promo card of himself at his own company website