Firstly, this way you will get a residence permit for 3 years, not for 1 year, meaning you won’t need to renew it anytime soon, you will save your resources.
Secondly, when submitting from Spain, the probability of approval is greater, in the presence of additional requests there is an opportunity to give faster answers to them, thanks to the Spanish lawyer in the team, who knows even the most subtle nuances and will solve all issues due to extensive experience and the necessary legal contacts.
Thirdly, consulates in different countries may have their own requirements and additional requests, and human factors can play a role, in Spain, everything works clearly and smoothly. Dozens of our clients are convinced of this.