that's a good question,
As we have seen with the 3020 series, and 4020 series,
and now the 2305, they didn't really reinvent the lineup. No major changes in frames, or wheelbase etc. So far,
they basically have expanded models to include a wider range of HP within each frame size. If we end up with a 2320 and 2520, and they follow suit, I would imagine the 2520 to be a 4115 based machine, maybe a HP or so more, but still within the size and weight of what we had. I could be wrong, but if that is what we get, we still don't have a direct model to compete with those Kubota models. They seem to have the size of a 790, or maybe the 855, which no 4115 can compete against, although I think it's been attempted! And, the 3120/4210 jumps way up in weight, over all of them.
Time will tell!
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