Spill guard is optional but it is worth it. I have it on my new M135GX and learned to love it the first day, but on the 135 it cost $1,000. It just sys optional on the 60. As for remotes, it says 2 remotes are standard on "Cold Climate Cabs". That may mean a special package is involved, but also since this is a Canadian spec sheet, it may be Canada specific. Just something to make sure of before buying.
My 135 also has the rear wiper and heated rear window plus rear work lights. I added the rear works lights on my L5740 (they should have been standard) and was going to add the heated rear glass when I found I could survive with the air conditioner running all winter to dehumidify the cab. They are welcome standard features, especially for first time cab owners who don't realize how much humidity your body puts into a small cab when working in the snow.
I was going to trade my L5740 for a L6060 before I let my dementia get the better of me and bought the 135. Then my neighbor, who had ordered a New Holland of equivalent size, drove my tractor while it was waiting to be loaded at the dealer Thursday and switched his NH order to a tractor just like mine. I had to wait for 3 weeks to get mine - he ordered his Thursday and it is being delivered Tuesday. Lives a purer life I guess.