The Pokemon GO Holiday Part 1 Timed Research has two branches that you must choose from: Spark or Sierra. The former focuses on Ice-type creatures, while the latter prioritizes Fire-types. You must start the quest before the event ends on December 22, 2024, and complete the tasks and collect the rewards before 8 pm local time on December 27, 2024.There is only one difference between the rewards of the Spark and Sierra tracks in the Pokemon GO Holiday Part 1 Timed Research. Choosing Spark nets you the more relevant reward — one that you can use in the game while the event is still running.This guide covers the differences in tasks and suggests which the better path is, based on your needs.Note: This article is subjective and reflects the writer's opinions.Also read: Pokemon GO Evolution CalculatorPokemon GO Holiday Part 1 Timed Research: Tasks and rewardsThe following tasks are available once you make the choice in Holiday Part 1 Timed Research in Pokemon GO:Spark path Stage 2Catch 10 Ice-type Pokemon - Pinap Berry ×10Take snapshots of 5 different wild Pokemon - Poke Ball ×20Complete 5 Field Research tasks - Stardust ×500End of set rewards: Alolan Vulpix [shiny encounter possible] and 2,000 XPSpark path Stage 3Catch 25 Ice-type Pokemon - Ultra Ball ×10Power up Ice-type Pokemon 10 times - Golden Razz Berry ×1Collect MP from 3 Power Spots - Max Particle ×100End of set rewards: Sandygast [shiny encounter possible], 3,000 XP, and 2,000 StardustAlso read: Pokemon GO Holiday Part 1 preparation guideSierra path Stage 2Catch 10 Fire-type Pokemon - Pinap Berry ×10Take snapshots of 5 different wild Pokemon - Poke Ball ×20Complete 5 Field Research tasks - Stardust ×500End of set rewards: Shadow Vulpix and 2,000 XPSierra path Stage 3Catch 25 Fire-type Pokemon - Ultra Ball ×10Power up Fire-type Pokemon 10 times - Golden Razz Berry ×1Collect MP from 3 Power Spots - Max Particle ×100End of set rewards: Sandygast [shiny encounter possible], 3,000 XP, and 2,000 StardustYou can check out the whole questline in our Holiday Part 1 Timed Research: Shore Thing Tasks and Rewards guide.Conclusion: Which path is the better choice in Pokemon GO Holiday Part 1 Timed Research?The only difference between the two tracks of the Pokemon GO Holiday Part 1 Timed Research is that you focus on Ice-type critters and get an Alolan Vulpix encounter if you choose Spark. Whereas, if you choose Sierra, you focus on Fire-type critters and get a Shadow Vulpix encounter.Both Alolan Vulpix and Shadow Vulpix are common creatures. If you don't have the former, this is an excellent chance to get one for the Little Holiday Cup in Pokemon GO.Check out our other Pokemon GO guides:Ditto disguisesBuddy Evolution Adventure Together guideBest Fast Attacks in Pokemon GOSierra countersCliff countersArlo countersGiovanni countersTeam GO Rocket GruntsEvolution CalculatorPokemon Type Calculator