I've dynoed a bunch of 17.5 motors from a bunch of brands. The ones from companies that cater to racers like Fantom, Trinity, R1, Motiv, all perform similarly of the same generation. Maybe some differences in the power band, but not much in peak power. Adjusting for these differences in power band can be done with gearing. I only had one 17.5 Tekin. It didn't test well, because I found out it had a bad rotor.

I wouldn't overthink it.