I propose you don't move the goalpost
. I'm claiming Potiguara is easier than Aztec and probably than Inca, not that I can do it myself. Delhi is easier to 1-tag than either of those, but it turns out that they're pretty freaking hard too.
But in terms of relative viability/possible position in the game within the first 100 years, Potiguara wins over Aztec. Potiguara can conquer 300 development and complete westernization before 1550. With Aztec you can...pass 5 reforms and sit there, then tech to ADM 5, then maybe get a border core in time to start westernizing by 1550 if you're exceptionally lucky, otherwise you eat a blind colonial conquest DoW or just wind up waiting until 1560+ to start westernizing. Not a guaranteed loss outright, but a guaranteed loss of time.
Western + similar development at 1530 vs western at 1570 or 1580. My assertion is that the former is likely the easier candidate for 1-tagging because its position is better. Your assertion that the latter is a better position is...somewhat lacking in evidence.
But maybe I'm wrong. Can you show me how Aztec can *consistently* westernize in the 1520-1550 range in 1.13.1? If you can I would change my position. Otherwise, to the best of my knowledge now Potiguara can do it and Aztec can't, so the former wins.