If you get a definitive answer on this one you could be the first. From what I read the big three are:
I have always used Trojan batteries for no other reason than I have always read they are a quality battery and when I started buying batteries, my Dad managed cart fleets at a golf course so had many technical contacts at Trojan.
I have read that a cart mechanic I respect has seen issues in recent years with Trojan under warranty and has switched to Crown. I have not talked to him, but it may be worth a call for you for specifics. He should be in the paper under c_a_r_t_f_i_x_e_r.
I would also ask Battery Boys, Frank (TOTV) and Spano if they see a brand failing under warranty or under achieving.
From my own experience, I have a set of 8-6v T105s in my Club Car that are 3 years and 3 months old. I just ran them
47 miles and had
48 volts left in the pack.
It would be hard for me to move away from Trojan without first talking to folks who sell and support batteries for a living telling me why I should.
PS. Thank you for using electric!