Spitfire all the way
Their SBI dry runs were far more like the real deal. I did both ECIC and Spitfire, but if I could talk to myself from a year ago I’d just recommend spitfire.
Customer service seemed better with them, as well. My HR top-off was via zoom and 100% focused. My ECIC top-off was on speakerphone while he was driving. ECIC sat back after becoming BMOC, and it shows.