How about sitting next to your instructor vs. sitting in a row? Does that affect much?
Sadly aerobatic aircraft seem somewhat rare around here, the R2160 would be the only one which is located conveniently close while the Decathlon is quite a drive. However I feel like it would be the nicer aircraft with a CS prop, more power, inverted fuel/oil system and some tail wheel experience along the way...
I'm pretty confident that both schools will provide quality training however the choice of aircraft is a tricky one for me...