L3301, no issues, economy model, DPF that works.
B3350, litany of issues with DPF, has bells and whistles.
Depending upon intended uses, Id get the L. Barely physically bigger then the large B, but more cubes in the engine, bigger bucket, loaded rears really make it great for ground engaging implements.
I was all set to pull the trigger on an L2501, but my reality is I mow 80% of the engine hours. For less money, I ordered the BX23S with loader/backhoe and 60" deck. Does everything I need, whereas the L, I would still need to purchase a 3pt mower.
Im not a farmer. I bush hog maybe an acre. Stepping down to the little guy afforded me the backhoe to plant trees and Im going to plant hundreds...
If your going to maintain or build a drive, bush hog acres, a lot of loader work then a L is the ticket. If your going to mow, do loader work, and some ground engagement the B would be fine.