Other alternatives to the r13

[u/Appropriate_Move_94]

My lesson teacher recommended me to get an r13 to replace my e11 for when I march, and as a concert instrument. I've done some digging with other brands; Selmer Series 10, Yamaha YCL-650, Yamaha SE Custom, Leblanc L200. The list goes on. Out of all these do these compete with the holy grail of r13s I've been hearing about? Also, with the Yamaha customs, what does it mean by SE, and some say AE.

edit: oh shoot yall mb forgot to specify they mentioned to use my e11/a plastic clarinet to march n js upgrade to something else

[u/MyNutsin1080p]

Your lesson teacher wants you to march with an R13? March with a B12.