WHAT DOES CAT GTX BOT MEAN?

I am taking a look at paying for a completely new machine quickly, both a 2023 259D3 or T66 bobcat. Both are 74hp and immediate comparison in my eyes. I Earlier experienced a Cat 257 then switched into a Bobcat T595 to get a few years so have "some" working experience with their predecessors (Regardless that the 257B ASV undercarriage was fully div