There's not too many better looking tractors than a 4020 restored. That first picture is a what not to do. I don't know what I dislike the most, the painted green muffler, the modern decals or the yellow rear axle. The original axles weren't painted from the factory but they do look good painted black.
The 4010 pictured on the other hand looks great and I believe I could find some use out of it.
Eh, I think I would pick a Ford 8N as my favorite classic tractor although there are some neat old Farmalls out there.
I certainly do agree with the garbage restoration job though, but honestly I've never been around a restored tractor unless at a show somewhere. We are still running an International Super "C", a 1964 International 504, 2 1970's JD 4430's one with cab one without, 1980's JD 2240, my sister's 1950 Ford 8N that I hauled out west from Ohio 6-7 years ago, and the crown jewel a 2013 New Holland T7.270. All with pretty much the minimal done to them throughout the years, just enough to keep them chugging along. Really don't see much point in tractor restoration when you can still get significant use out of them.