I'm sure they're both nice, I have some experience with the Brison, flying a plane with a 2.4 and I just got a 3.2 for installation in my new plane. Don't worry about the mechanical spark advance, it has worked for many years. Brison's customer service is very good also. I'm sure someone will chime in about the BME, which is great, but I think they would both work well. A friend of mine had a Brison 3.2 on the Lanier Cap kit and said it was a perfect combo. Mine is going on a Midwest Extra, which is nearly identical in specs to their Cap.