The primary functional difference between them (besides having different names) is that Red Elemental Blast can only target blue cards, whereas Pyroblast can target any card and only counters it or destroys it if its blue
It is a decent removal/counterspell, and a cantrip with Ephara out
Put two loyalty counters on it for each planeswalker destroyed this way
After all, there are a limited number of decklists from major events out there to go off of
Instead, Pokemon TCG Live is primarily designed for players to experiment with cards, and as such, it gives them away quite generously, in addition to awarding booster packs for every physical booster purchase
Thats great news if its in your deck, though