I hear those kinds of comments every once in a while and often wondered about them. I just did a quick comparison of the lbs/hp of the largest model in each of the Deere series. It was kind of interesting. I took shipping weight of cab and mfwd where available (9620 was without pto and 3ph, and I used a calculated pto hp of 85% of engine hp for comparison purposes). Of course, the 5303 will be lighter per hp just because of 2wd and no cab.

It's not scientific, but here goes. It's interesting how one of those so called light series (6420) is one of the heaviest that Deere has per hp without adding ballast. There are a lot of factors here, such as the wide variation in hp on the 9020 series which results in the 9620 needing a lot of ballast to bring it up to operating weight. I thought these numbers might help put size and weight into perspective related to horsepower.

Let's see if a copy/paste from a spreadsheet will work here.